SELECT 
  cscart_products_categories.product_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, 
  product_position_source.position AS position 
FROM 
  cscart_products_categories 
  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_categories.status IN ('A', 'H') 
  LEFT JOIN cscart_products_categories AS product_position_source ON cscart_products_categories.product_id = product_position_source.product_id 
  AND product_position_source.category_id = 277 
WHERE 
  cscart_products_categories.product_id IN (
    1130, 1127, 1126, 1125, 1124, 1123, 1111, 
    1110, 1109, 1108, 1107, 1099, 1094, 
    1088, 1054, 1053, 1051, 1050, 1048, 
    967, 960, 959, 958, 957, 956, 955, 954, 
    953, 952, 951, 950, 946, 941, 935, 932, 
    931, 930, 517, 515, 478, 477, 476, 475, 
    474, 434, 433, 432, 431
  ) 
GROUP BY 
  cscart_products_categories.product_id

Query time 0.00355

JSON explain

{
  "query_block": {
    "select_id": 1,
    "cost_info": {
      "query_cost": "49.84"
    },
    "grouping_operation": {
      "using_temporary_table": true,
      "using_filesort": true,
      "cost_info": {
        "sort_cost": "16.10"
      },
      "nested_loop": [
        {
          "table": {
            "table_name": "cscart_categories",
            "access_type": "ALL",
            "possible_keys": [
              "PRIMARY",
              "c_status",
              "p_category_id"
            ],
            "rows_examined_per_scan": 59,
            "rows_produced_per_join": 2,
            "filtered": "4.00",
            "cost_info": {
              "read_cost": "6.40",
              "eval_cost": "0.24",
              "prefix_cost": "6.64",
              "data_read_per_join": "6K"
            },
            "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')))"
          }
        },
        {
          "table": {
            "table_name": "cscart_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": 16,
            "filtered": "26.23",
            "index_condition": "(`wearethehelpful_scalesta_net`.`cscart_products_categories`.`product_id` in (1130,1127,1126,1125,1124,1123,1111,1110,1109,1108,1107,1099,1094,1088,1054,1053,1051,1050,1048,967,960,959,958,957,956,955,954,953,952,951,950,946,941,935,932,931,930,517,515,478,477,476,475,474,434,433,432,431))",
            "cost_info": {
              "read_cost": "15.34",
              "eval_cost": "1.61",
              "prefix_cost": "28.11",
              "data_read_per_join": "257"
            },
            "used_columns": [
              "product_id",
              "category_id",
              "link_type"
            ]
          }
        },
        {
          "table": {
            "table_name": "product_position_source",
            "access_type": "eq_ref",
            "possible_keys": [
              "PRIMARY",
              "pt"
            ],
            "key": "PRIMARY",
            "used_key_parts": [
              "category_id",
              "product_id"
            ],
            "key_length": "6",
            "ref": [
              "const",
              "wearethehelpful_scalesta_net.cscart_products_categories.product_id"
            ],
            "rows_examined_per_scan": 1,
            "rows_produced_per_join": 16,
            "filtered": "100.00",
            "cost_info": {
              "read_cost": "4.02",
              "eval_cost": "1.61",
              "prefix_cost": "33.75",
              "data_read_per_join": "257"
            },
            "used_columns": [
              "product_id",
              "category_id",
              "position"
            ]
          }
        }
      ]
    }
  }
}