SELECT 
  cscart_products.product_id, 
  cscart_products.company_id, 
  GROUP_CONCAT(
    IF(
      cscart_products_categories.link_type = 'M', 
      CONCAT(
        cscart_products_categories.category_id, 
        'M'
      ), 
      cscart_products_categories.category_id
    )
  ) as category_ids, 
  cscart_products.product_code, 
  cscart_products.weight, 
  cscart_products.tracking, 
  cscart_product_descriptions.product, 
  cscart_product_descriptions.short_description, 
  cscart_products.is_edp, 
  cscart_products.edp_shipping, 
  cscart_products.shipping_freight, 
  cscart_products.free_shipping, 
  cscart_products.zero_price_action, 
  cscart_products.tax_ids, 
  cscart_products.qty_step, 
  cscart_products.list_qty_count, 
  cscart_products.max_qty, 
  cscart_products.min_qty, 
  cscart_products.amount as in_stock, 
  cscart_products.shipping_params, 
  cscart_companies.status as company_status, 
  cscart_products.out_of_stock_actions, 
  cscart_products.updated_timestamp, 
  cscart_company_descriptions.i18n_company as company_name 
FROM 
  cscart_products 
  LEFT JOIN cscart_product_descriptions ON cscart_product_descriptions.product_id = cscart_products.product_id 
  AND cscart_product_descriptions.lang_code = 'en' 
  INNER JOIN cscart_products_categories ON cscart_products_categories.product_id = cscart_products.product_id 
  INNER JOIN cscart_categories ON cscart_categories.category_id = cscart_products_categories.category_id 
  AND cscart_categories.storefront_id IN (0, 1) 
  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_products.usergroup_ids = '' 
    OR FIND_IN_SET(
      0, cscart_products.usergroup_ids
    ) 
    OR FIND_IN_SET(
      1, cscart_products.usergroup_ids
    )
  ) 
  AND cscart_categories.status IN ('A', 'H') 
  AND cscart_products.status IN ('A', 'H') 
  LEFT JOIN cscart_companies ON cscart_companies.company_id = cscart_products.company_id 
  LEFT JOIN cscart_company_descriptions ON cscart_company_descriptions.company_id = cscart_products.company_id 
  AND cscart_company_descriptions.lang_code = 'en' 
WHERE 
  cscart_products.product_id = 403 
GROUP BY 
  cscart_products.product_id

Query time 0.00248

JSON explain

{
  "query_block": {
    "select_id": 1,
    "cost_info": {
      "query_cost": "0.70"
    },
    "grouping_operation": {
      "using_filesort": false,
      "nested_loop": [
        {
          "table": {
            "table_name": "cscart_products",
            "access_type": "const",
            "possible_keys": [
              "PRIMARY",
              "status"
            ],
            "key": "PRIMARY",
            "used_key_parts": [
              "product_id"
            ],
            "key_length": "3",
            "ref": [
              "const"
            ],
            "rows_examined_per_scan": 1,
            "rows_produced_per_join": 1,
            "filtered": "100.00",
            "cost_info": {
              "read_cost": "0.00",
              "eval_cost": "0.10",
              "prefix_cost": "0.00",
              "data_read_per_join": "4K"
            },
            "used_columns": [
              "product_id",
              "product_code",
              "status",
              "company_id",
              "amount",
              "weight",
              "shipping_freight",
              "updated_timestamp",
              "usergroup_ids",
              "is_edp",
              "edp_shipping",
              "tracking",
              "free_shipping",
              "zero_price_action",
              "out_of_stock_actions",
              "min_qty",
              "max_qty",
              "qty_step",
              "list_qty_count",
              "tax_ids",
              "shipping_params"
            ]
          }
        },
        {
          "table": {
            "table_name": "cscart_product_descriptions",
            "access_type": "const",
            "possible_keys": [
              "PRIMARY",
              "product_id"
            ],
            "key": "PRIMARY",
            "used_key_parts": [
              "product_id",
              "lang_code"
            ],
            "key_length": "9",
            "ref": [
              "const",
              "const"
            ],
            "rows_examined_per_scan": 1,
            "rows_produced_per_join": 1,
            "filtered": "100.00",
            "cost_info": {
              "read_cost": "0.00",
              "eval_cost": "0.10",
              "prefix_cost": "0.00",
              "data_read_per_join": "4K"
            },
            "used_columns": [
              "product_id",
              "lang_code",
              "product",
              "short_description"
            ]
          }
        },
        {
          "table": {
            "table_name": "cscart_companies",
            "access_type": "const",
            "possible_keys": [
              "PRIMARY"
            ],
            "key": "PRIMARY",
            "used_key_parts": [
              "company_id"
            ],
            "key_length": "4",
            "ref": [
              "const"
            ],
            "rows_examined_per_scan": 1,
            "rows_produced_per_join": 1,
            "filtered": "100.00",
            "cost_info": {
              "read_cost": "0.00",
              "eval_cost": "0.10",
              "prefix_cost": "0.00",
              "data_read_per_join": "6K"
            },
            "used_columns": [
              "company_id",
              "status"
            ]
          }
        },
        {
          "table": {
            "table_name": "cscart_company_descriptions",
            "access_type": "const",
            "possible_keys": [
              "PRIMARY"
            ],
            "key": "PRIMARY",
            "used_key_parts": [
              "company_id",
              "lang_code"
            ],
            "key_length": "10",
            "ref": [
              "const",
              "const"
            ],
            "rows_examined_per_scan": 1,
            "rows_produced_per_join": 1,
            "filtered": "100.00",
            "cost_info": {
              "read_cost": "0.00",
              "eval_cost": "0.10",
              "prefix_cost": "0.00",
              "data_read_per_join": "1K"
            },
            "used_columns": [
              "company_id",
              "lang_code",
              "i18n_company"
            ]
          }
        },
        {
          "table": {
            "table_name": "cscart_products_categories",
            "access_type": "ref",
            "possible_keys": [
              "PRIMARY",
              "pt"
            ],
            "key": "pt",
            "used_key_parts": [
              "product_id"
            ],
            "key_length": "3",
            "ref": [
              "const"
            ],
            "rows_examined_per_scan": 1,
            "rows_produced_per_join": 1,
            "filtered": "100.00",
            "cost_info": {
              "read_cost": "0.25",
              "eval_cost": "0.10",
              "prefix_cost": "0.35",
              "data_read_per_join": "16"
            },
            "used_columns": [
              "product_id",
              "category_id",
              "link_type"
            ]
          }
        },
        {
          "table": {
            "table_name": "cscart_categories",
            "access_type": "eq_ref",
            "possible_keys": [
              "PRIMARY",
              "c_status",
              "p_category_id"
            ],
            "key": "PRIMARY",
            "used_key_parts": [
              "category_id"
            ],
            "key_length": "3",
            "ref": [
              "wearethehelpful_scalesta_net.cscart_products_categories.category_id"
            ],
            "rows_examined_per_scan": 1,
            "rows_produced_per_join": 0,
            "filtered": "5.00",
            "cost_info": {
              "read_cost": "0.25",
              "eval_cost": "0.01",
              "prefix_cost": "0.70",
              "data_read_per_join": "133"
            },
            "used_columns": [
              "category_id",
              "storefront_id",
              "usergroup_ids",
              "status"
            ],
            "attached_condition": "((`wearethehelpful_scalesta_net`.`cscart_categories`.`storefront_id` in (0,1)) and ((`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')))"
          }
        }
      ]
    }
  }
}

Result

product_id company_id category_ids product_code weight tracking product short_description is_edp edp_shipping shipping_freight free_shipping zero_price_action tax_ids qty_step list_qty_count max_qty min_qty in_stock shipping_params company_status out_of_stock_actions updated_timestamp company_name
403 22 286,276M 0.000 Postnatal + Feeding Support - GROW + GATHER (GIFT VOUCHER - Edinburgh) <h4><span style="color: var(--redactor2-fg-heading);">Postnatal + Feeding Support -&nbsp;The gift of support and peace of mind when they have welcomed a new little love into the world.</span></h4> <p><strong>**Classes are located in Edinburgh**</strong></p> <p>An at home support session once baby has arrived with time to focus on feeding. Sessions can last from one hour to a whole afternoon depending on your need. One of our qualified midwives can visit you at home, at a time that suits you and when you know baby might be ready to feed, to ensure that feeding is going well and to help you with any issue that you might be having. Great for reassurance if this is your first baby as well as promoting confidence for anyone who has fed before. Happy to chat about your birth experiences and make sure that you are feeling well physically and emotionally.&nbsp;</p> <h5></h5> <h5> </h5> <h5></h5> <p><br></p> <p></p> N N 0.00 N 10 a:5:{s:16:"min_items_in_box";i:0;s:16:"max_items_in_box";i:0;s:10:"box_length";i:0;s:9:"box_width";i:0;s:10:"box_height";i:0;} A N 1766492956 Grow+Gather