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 = 7197 
WHERE 
  cscart_products_categories.product_id IN (
    88058, 84851, 88037, 88059, 88060, 87907, 
    87940, 88091, 88090, 88087, 88086, 
    93150, 93151, 93152, 93153, 93154, 
    93155, 93156, 93157, 93158, 93159, 
    93789, 93795, 93796, 93797, 94448, 
    94450, 94451, 94504, 94796, 94797, 
    94798, 94799, 94800, 94801, 94802, 
    94803, 94804, 94805, 94806, 94807, 
    94808, 94809, 94810, 94823, 94824, 
    94825, 94826, 94827, 94828, 94829, 
    94830, 94831, 94832, 94842, 95312, 
    95313, 95555, 95556, 95736, 95737, 
    95738, 95739, 95740, 95741, 95742, 
    95743, 95744, 95745, 95746, 95747, 
    95748, 95749, 95750, 95751, 95752, 
    95753, 95754, 95755, 95765, 95786, 
    95787, 95788, 95813, 95814, 95815, 
    95816, 95817, 95818, 95819, 95820, 
    95832, 95833, 95834, 95835, 95836
  ) 
GROUP BY 
  cscart_products_categories.product_id

Query time 0.01568

JSON explain

{
  "query_block": {
    "select_id": 1,
    "cost_info": {
      "query_cost": "101.10"
    },
    "grouping_operation": {
      "using_filesort": false,
      "nested_loop": [
        {
          "table": {
            "table_name": "cscart_products_categories",
            "access_type": "range",
            "possible_keys": [
              "PRIMARY",
              "link_type",
              "pt"
            ],
            "key": "pt",
            "used_key_parts": [
              "product_id"
            ],
            "key_length": "3",
            "rows_examined_per_scan": 112,
            "rows_produced_per_join": 112,
            "filtered": "100.00",
            "using_index": true,
            "cost_info": {
              "read_cost": "11.50",
              "eval_cost": "11.20",
              "prefix_cost": "22.70",
              "data_read_per_join": "1K"
            },
            "used_columns": [
              "product_id",
              "category_id",
              "link_type"
            ],
            "attached_condition": "(`nuie_scalesta_net`.`cscart_products_categories`.`product_id` in (88058,84851,88037,88059,88060,87907,87940,88091,88090,88087,88086,93150,93151,93152,93153,93154,93155,93156,93157,93158,93159,93789,93795,93796,93797,94448,94450,94451,94504,94796,94797,94798,94799,94800,94801,94802,94803,94804,94805,94806,94807,94808,94809,94810,94823,94824,94825,94826,94827,94828,94829,94830,94831,94832,94842,95312,95313,95555,95556,95736,95737,95738,95739,95740,95741,95742,95743,95744,95745,95746,95747,95748,95749,95750,95751,95752,95753,95754,95755,95765,95786,95787,95788,95813,95814,95815,95816,95817,95818,95819,95820,95832,95833,95834,95835,95836))"
          }
        },
        {
          "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",
              "nuie_scalesta_net.cscart_products_categories.product_id"
            ],
            "rows_examined_per_scan": 1,
            "rows_produced_per_join": 112,
            "filtered": "100.00",
            "cost_info": {
              "read_cost": "28.00",
              "eval_cost": "11.20",
              "prefix_cost": "61.90",
              "data_read_per_join": "1K"
            },
            "used_columns": [
              "product_id",
              "category_id",
              "position"
            ]
          }
        },
        {
          "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": [
              "nuie_scalesta_net.cscart_products_categories.category_id"
            ],
            "rows_examined_per_scan": 1,
            "rows_produced_per_join": 5,
            "filtered": "5.00",
            "cost_info": {
              "read_cost": "28.00",
              "eval_cost": "0.56",
              "prefix_cost": "101.10",
              "data_read_per_join": "14K"
            },
            "used_columns": [
              "category_id",
              "usergroup_ids",
              "status",
              "storefront_id"
            ],
            "attached_condition": "((`nuie_scalesta_net`.`cscart_categories`.`storefront_id` in (0,1)) and ((`nuie_scalesta_net`.`cscart_categories`.`usergroup_ids` = '') or (0 <> find_in_set(0,`nuie_scalesta_net`.`cscart_categories`.`usergroup_ids`)) or (0 <> find_in_set(1,`nuie_scalesta_net`.`cscart_categories`.`usergroup_ids`))) and (`nuie_scalesta_net`.`cscart_categories`.`status` in ('A','H')))"
          }
        }
      ]
    }
  }
}