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 
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') 
WHERE 
  cscart_products_categories.product_id IN (
    11013, 11011, 11015, 11014, 11016, 11228, 
    11229, 11330, 11331, 11332, 11333, 
    11334, 11335, 11373, 11376, 11401, 
    11402, 11403, 11404, 11405, 11432, 
    11433, 11459, 11461, 11464, 11466, 
    11468, 11482, 11483, 11484, 11485, 
    11486, 11496, 11497, 11498, 11499, 
    11501, 11502, 11503, 11504, 11511, 
    11512, 11513, 11540, 11541, 11544, 
    11545, 11546, 11547, 11548, 11549, 
    11554, 11556, 11557, 11558, 11568, 
    11569
  ) 
GROUP BY 
  cscart_products_categories.product_id

Query time 0.00130

JSON explain

{
  "query_block": {
    "select_id": 1,
    "cost_info": {
      "query_cost": "386.26"
    },
    "grouping_operation": {
      "using_filesort": false,
      "nested_loop": [
        {
          "table": {
            "table_name": "cscart_products_categories",
            "access_type": "range",
            "possible_keys": [
              "PRIMARY",
              "pt"
            ],
            "key": "pt",
            "used_key_parts": [
              "product_id"
            ],
            "key_length": "3",
            "rows_examined_per_scan": 465,
            "rows_produced_per_join": 465,
            "filtered": "100.00",
            "index_condition": "(`softwarepirmam_hewadelivard_cscart_4`.`cscart_products_categories`.`product_id` in (11013,11011,11015,11014,11016,11228,11229,11330,11331,11332,11333,11334,11335,11373,11376,11401,11402,11403,11404,11405,11432,11433,11459,11461,11464,11466,11468,11482,11483,11484,11485,11486,11496,11497,11498,11499,11501,11502,11503,11504,11511,11512,11513,11540,11541,11544,11545,11546,11547,11548,11549,11554,11556,11557,11558,11568,11569))",
            "cost_info": {
              "read_cost": "177.01",
              "eval_cost": "46.50",
              "prefix_cost": "223.51",
              "data_read_per_join": "7K"
            },
            "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": [
              "softwarepirmam_hewadelivard_cscart_4.cscart_products_categories.category_id"
            ],
            "rows_examined_per_scan": 1,
            "rows_produced_per_join": 23,
            "filtered": "5.00",
            "cost_info": {
              "read_cost": "116.25",
              "eval_cost": "2.33",
              "prefix_cost": "386.26",
              "data_read_per_join": "72K"
            },
            "used_columns": [
              "category_id",
              "storefront_id",
              "usergroup_ids",
              "status"
            ],
            "attached_condition": "((`softwarepirmam_hewadelivard_cscart_4`.`cscart_categories`.`storefront_id` in (0,1)) and ((`softwarepirmam_hewadelivard_cscart_4`.`cscart_categories`.`usergroup_ids` = '') or (0 <> find_in_set(0,`softwarepirmam_hewadelivard_cscart_4`.`cscart_categories`.`usergroup_ids`)) or (0 <> find_in_set(1,`softwarepirmam_hewadelivard_cscart_4`.`cscart_categories`.`usergroup_ids`))) and (`softwarepirmam_hewadelivard_cscart_4`.`cscart_categories`.`status` in ('A','H')))"
          }
        }
      ]
    }
  }
}