Sandbox

SELECT 
  SQL_CALC_FOUND_ROWS products.product_id, 
  descr1.product as product, 
  companies.company as company_name, 
  products.product_type, 
  products.parent_product_id, 
  IF(
    products.age_verification = 'Y', 
    'Y', 
    IF(
      cscart_categories.age_verification = 'Y', 
      'Y', cscart_categories.parent_age_verification
    )
  ) as need_age_verification, 
  IF(
    products.age_limit > cscart_categories.age_limit, 
    IF(
      products.age_limit > cscart_categories.parent_age_limit, 
      products.age_limit, cscart_categories.parent_age_limit
    ), 
    IF(
      cscart_categories.age_limit > cscart_categories.parent_age_limit, 
      cscart_categories.age_limit, cscart_categories.parent_age_limit
    )
  ) as age_limit 
FROM 
  cscart_products as products 
  LEFT JOIN cscart_product_descriptions as descr1 ON descr1.product_id = products.product_id 
  AND descr1.lang_code = 'en' 
  LEFT JOIN cscart_product_prices as prices ON prices.product_id = products.product_id 
  AND prices.lower_limit = 1 
  LEFT JOIN cscart_companies AS companies ON companies.company_id = products.company_id 
  INNER JOIN cscart_products_categories as products_categories ON products_categories.product_id = products.product_id 
  INNER JOIN cscart_categories ON cscart_categories.category_id = products_categories.category_id 
  AND (
    cscart_categories.usergroup_ids = '' 
    OR FIND_IN_SET(
      0, cscart_categories.usergroup_ids
    ) 
    OR FIND_IN_SET(
      1, cscart_categories.usergroup_ids
    )
  ) 
  AND cscart_categories.status IN ('A', 'H') 
  AND cscart_categories.storefront_id IN (0, 1) 
WHERE 
  1 
  AND cscart_categories.category_id IN (278, 291, 308, 311, 322, 323, 324) 
  AND companies.status IN ('A') 
  AND (
    products.usergroup_ids = '' 
    OR FIND_IN_SET(0, products.usergroup_ids) 
    OR FIND_IN_SET(1, products.usergroup_ids)
  ) 
  AND products.status IN ('A') 
  AND prices.usergroup_id IN (0, 0, 1) 
  AND products.parent_product_id = 0 
GROUP BY 
  products.product_id 
ORDER BY 
  products.timestamp desc, 
  products.product_id ASC 
LIMIT 
  48, 48

Query time 0.01115

JSON explain

{
  "query_block": {
    "select_id": 1,
    "cost_info": {
      "query_cost": "8.82"
    },
    "ordering_operation": {
      "using_filesort": true,
      "grouping_operation": {
        "using_temporary_table": true,
        "using_filesort": false,
        "nested_loop": [
          {
            "table": {
              "table_name": "cscart_categories",
              "access_type": "range",
              "possible_keys": [
                "PRIMARY",
                "c_status",
                "p_category_id"
              ],
              "key": "PRIMARY",
              "used_key_parts": [
                "category_id"
              ],
              "key_length": "3",
              "rows_examined_per_scan": 7,
              "rows_produced_per_join": 0,
              "filtered": "4.00",
              "index_condition": "(`wearethehelpful_scalesta_net`.`cscart_categories`.`category_id` in (278,291,308,311,322,323,324))",
              "cost_info": {
                "read_cost": "4.88",
                "eval_cost": "0.03",
                "prefix_cost": "4.91",
                "data_read_per_join": "748"
              },
              "used_columns": [
                "category_id",
                "storefront_id",
                "usergroup_ids",
                "status",
                "age_verification",
                "age_limit",
                "parent_age_verification",
                "parent_age_limit"
              ],
              "attached_condition": "(((`wearethehelpful_scalesta_net`.`cscart_categories`.`usergroup_ids` = '') or (0 <> find_in_set(0,`wearethehelpful_scalesta_net`.`cscart_categories`.`usergroup_ids`)) or (0 <> find_in_set(1,`wearethehelpful_scalesta_net`.`cscart_categories`.`usergroup_ids`))) and (`wearethehelpful_scalesta_net`.`cscart_categories`.`status` in ('A','H')) and (`wearethehelpful_scalesta_net`.`cscart_categories`.`storefront_id` in (0,1)))"
            }
          },
          {
            "table": {
              "table_name": "products_categories",
              "access_type": "ref",
              "possible_keys": [
                "PRIMARY",
                "pt"
              ],
              "key": "PRIMARY",
              "used_key_parts": [
                "category_id"
              ],
              "key_length": "3",
              "ref": [
                "wearethehelpful_scalesta_net.cscart_categories.category_id"
              ],
              "rows_examined_per_scan": 26,
              "rows_produced_per_join": 7,
              "filtered": "100.00",
              "using_index": true,
              "cost_info": {
                "read_cost": "0.11",
                "eval_cost": "0.73",
                "prefix_cost": "5.75",
                "data_read_per_join": "116"
              },
              "used_columns": [
                "product_id",
                "category_id"
              ]
            }
          },
          {
            "table": {
              "table_name": "products",
              "access_type": "eq_ref",
              "possible_keys": [
                "PRIMARY",
                "status",
                "idx_parent_product_id"
              ],
              "key": "PRIMARY",
              "used_key_parts": [
                "product_id"
              ],
              "key_length": "3",
              "ref": [
                "wearethehelpful_scalesta_net.products_categories.product_id"
              ],
              "rows_examined_per_scan": 1,
              "rows_produced_per_join": 1,
              "filtered": "17.17",
              "cost_info": {
                "read_cost": "1.82",
                "eval_cost": "0.13",
                "prefix_cost": "8.30",
                "data_read_per_join": "5K"
              },
              "used_columns": [
                "product_id",
                "product_type",
                "status",
                "company_id",
                "timestamp",
                "usergroup_ids",
                "age_verification",
                "age_limit",
                "parent_product_id"
              ],
              "attached_condition": "((`wearethehelpful_scalesta_net`.`products`.`parent_product_id` = 0) and ((`wearethehelpful_scalesta_net`.`products`.`usergroup_ids` = '') or (0 <> find_in_set(0,`wearethehelpful_scalesta_net`.`products`.`usergroup_ids`)) or (0 <> find_in_set(1,`wearethehelpful_scalesta_net`.`products`.`usergroup_ids`))) and (`wearethehelpful_scalesta_net`.`products`.`status` = 'A'))"
            }
          },
          {
            "table": {
              "table_name": "companies",
              "access_type": "eq_ref",
              "possible_keys": [
                "PRIMARY"
              ],
              "key": "PRIMARY",
              "used_key_parts": [
                "company_id"
              ],
              "key_length": "4",
              "ref": [
                "wearethehelpful_scalesta_net.products.company_id"
              ],
              "rows_examined_per_scan": 1,
              "rows_produced_per_join": 0,
              "filtered": "10.00",
              "cost_info": {
                "read_cost": "0.31",
                "eval_cost": "0.01",
                "prefix_cost": "8.74",
                "data_read_per_join": "892"
              },
              "used_columns": [
                "company_id",
                "status",
                "company"
              ],
              "attached_condition": "(`wearethehelpful_scalesta_net`.`companies`.`status` = 'A')"
            }
          },
          {
            "table": {
              "table_name": "prices",
              "access_type": "ref",
              "possible_keys": [
                "usergroup",
                "product_id",
                "lower_limit",
                "usergroup_id"
              ],
              "key": "product_id",
              "used_key_parts": [
                "product_id"
              ],
              "key_length": "3",
              "ref": [
                "wearethehelpful_scalesta_net.products_categories.product_id"
              ],
              "rows_examined_per_scan": 1,
              "rows_produced_per_join": 0,
              "filtered": "99.73",
              "cost_info": {
                "read_cost": "0.03",
                "eval_cost": "0.01",
                "prefix_cost": "8.78",
                "data_read_per_join": "2"
              },
              "used_columns": [
                "product_id",
                "lower_limit",
                "usergroup_id"
              ],
              "attached_condition": "((`wearethehelpful_scalesta_net`.`prices`.`lower_limit` = 1) and (`wearethehelpful_scalesta_net`.`prices`.`usergroup_id` in (0,0,1)))"
            }
          },
          {
            "table": {
              "table_name": "descr1",
              "access_type": "eq_ref",
              "possible_keys": [
                "PRIMARY",
                "product_id"
              ],
              "key": "PRIMARY",
              "used_key_parts": [
                "product_id",
                "lang_code"
              ],
              "key_length": "9",
              "ref": [
                "wearethehelpful_scalesta_net.products_categories.product_id",
                "const"
              ],
              "rows_examined_per_scan": 1,
              "rows_produced_per_join": 0,
              "filtered": "100.00",
              "cost_info": {
                "read_cost": "0.03",
                "eval_cost": "0.01",
                "prefix_cost": "8.82",
                "data_read_per_join": "582"
              },
              "used_columns": [
                "product_id",
                "lang_code",
                "product"
              ]
            }
          }
        ]
      }
    }
  }
}

Result

product_id	product	company_name	product_type	need_age_verification
958	Lavender Handmade Salt Soap & Bath Salts Gift Set	Dook	P	N
957	Gift Set - Bergamot Salt Soap & Bath Salts	Dook	P	N
956	Dook x Lind & Lime Bath Salts - 200g	Dook	P	N
955	Mandarin, Rosemary, Bergamot & Cedar Bath Salts - 400g	Dook	P	N
954	Mandarin, Rosemary, Bergamot & Cedar Bath Salts - 200g	Dook	P	N
953	Lavender, Mandarin, Coriander & Cedar Bath Salts - 400g	Dook	P	N
952	Lavender, Mandarin, Coriander & Cedar Bath Salts - 200g	Dook	P	N
951	Bergamot, Juniper and Rose Geranium Bath Salts - 400g	Dook	P	N
950	Bath Salts - Bergamot, Juniper and Rose Geranium - 200g Tin	Dook	P	N
945	Elevate by Lauren Anderson QUARTERLY membership	Elevate by Lauren	P	N
944	Elevate by Lauren Anderson ANNUAL membership	Elevate by Lauren	P	N
941	The Rescue Set by The SABI	The SABI	P	N
937	The Digestive Infusion by The SABI	The SABI	P	N
935	Calming Herbata Infusion by The SABI	The SABI	P	N
932	Food Doula 7 Day Nourish and Restore Food Support	The Food Doula	P	N
931	Food Doula 5 Day Nourish and Restore Food Support	The Food Doula	P	N
930	Food Doula 3 Day Nourish and Restore Food Support	The Food Doula	P	N
915	Sage Block Print Cotton Robe	We are The Helpful	P	N
517	FieldGoods - The Classics	FieldGoods	P	N
515	FieldGoods Food Bundle - Ell & Sam's Picks	FieldGoods	P	N
478	Vegan Bundle - 8 meals	Pots for Tots	C	N
477	Pots for Tots Kids Taster Bundle - 8 meals	Pots for Tots	C	N
434	Burgundy Writing Journal (School of Life)	We are The Helpful	P	N
433	Sage Writing Journal (School of Life)	We are The Helpful	P	N
432	Writing as Therapy Journal - 'Ideas' Edition (School of Life)	We are The Helpful	P	N
431	Writing as Therapy Journal - 'Journeys' Edition (School of Life)	We are The Helpful	P	N
424	Nurture Self Bundle	We are The Helpful	P	N
423	Her Gentle Habits Bundle	We are The Helpful	P	N
422	The Recovery Journey Bundle	We are The Helpful	P	N
421	MODM BODY Self Care Bundle	We are The Helpful	P	N
420	MODM Vitamin FACE Self Care Bundle	We are The Helpful	P	N
419	MODM Face + Body Self Care Bundle	We are The Helpful	P	N
376	MODM Vitamin Repair Face Oil	We are The Helpful	P	N
375	MODM Vitamin Repair Balm	We are The Helpful	P	N
374	MODM Vitamin Cleansing Gel	We are The Helpful	P	N
373	MODM Minis Set - Rose + Neroli	We are The Helpful	P	N
372	MODM Body Renewal Polish - Neroli + Rose	We are The Helpful	P	N
371	MODM Body Renewal Balm - Neroli + Rose	We are The Helpful	P	N
369	This is Incense - Margaret River	We are The Helpful	P	N
358	Never Go Alone - Renew Hand Cream	We are The Helpful	P	N
357	Never Go Alone - Sanitising Treatment Mist	We are The Helpful	P	N
355	Ceramic Incense Clip Holder	We are The Helpful	P	N
354	Gentle Habits - Positive Outcomes Journal	We are The Helpful	P	N
353	SoKind - Pure Kindness Repair Balm	We are The Helpful	P	N
350	Palm of Feronia - Tea Discovery Gift Set	We are The Helpful	P	N
349	Palm of Feronia - Hinoki Self Massage Oil	We are The Helpful	P	N
332	This is Incense -BYRON BAY	We are The Helpful	P	N
303	Incense Holder	We are The Helpful	P	N