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 = 7263 
WHERE 
  cscart_products_categories.product_id IN (
    92424, 92425, 92426, 92427, 92428, 92429, 
    92431, 92432, 92433, 92434, 92435, 
    92436, 92437, 92438, 87252, 87253, 
    87254, 87255, 87256, 87257, 87258, 
    87259, 88102, 88103, 92430, 92439, 
    84775, 84779, 84788, 84797, 88070, 
    88394, 87962, 88079, 88084, 87994, 
    88390, 91428, 91430, 88395, 86887, 
    88389, 88391, 88388, 88392, 87993, 
    91427, 91429, 88393, 93790, 93791, 
    93842, 93843, 93844, 93845, 94619, 
    94620, 94621, 94622, 94623, 94624, 
    94625, 94626, 94627, 94628, 94629, 
    94630, 94631, 94632, 94633, 94634, 
    94635, 94636, 94637, 94638, 94639, 
    94640, 94671, 94672, 94673, 94674, 
    94822, 94844, 94845, 94846, 94847, 
    94848, 94952, 94953, 94954, 94955, 
    95310, 95311, 95317, 95320, 95361
  ) 
GROUP BY 
  cscart_products_categories.product_id

Query time 0.00234

JSON explain

{
  "query_block": {
    "select_id": 1,
    "cost_info": {
      "query_cost": "54.77"
    },
    "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": 96,
            "rows_produced_per_join": 96,
            "filtered": "100.00",
            "using_index": true,
            "cost_info": {
              "read_cost": "9.89",
              "eval_cost": "9.60",
              "prefix_cost": "19.49",
              "data_read_per_join": "1K"
            },
            "used_columns": [
              "product_id",
              "category_id",
              "link_type"
            ],
            "attached_condition": "(`nuie_scalesta_net`.`cscart_products_categories`.`product_id` in (92424,92425,92426,92427,92428,92429,92431,92432,92433,92434,92435,92436,92437,92438,87252,87253,87254,87255,87256,87257,87258,87259,88102,88103,92430,92439,84775,84779,84788,84797,88070,88394,87962,88079,88084,87994,88390,91428,91430,88395,86887,88389,88391,88388,88392,87993,91427,91429,88393,93790,93791,93842,93843,93844,93845,94619,94620,94621,94622,94623,94624,94625,94626,94627,94628,94629,94630,94631,94632,94633,94634,94635,94636,94637,94638,94639,94640,94671,94672,94673,94674,94822,94844,94845,94846,94847,94848,94952,94953,94954,94955,95310,95311,95317,95320,95361))"
          }
        },
        {
          "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": 4,
            "filtered": "5.00",
            "cost_info": {
              "read_cost": "24.00",
              "eval_cost": "0.48",
              "prefix_cost": "53.09",
              "data_read_per_join": "12K"
            },
            "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')))"
          }
        },
        {
          "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": 4,
            "filtered": "100.00",
            "cost_info": {
              "read_cost": "1.20",
              "eval_cost": "0.48",
              "prefix_cost": "54.77",
              "data_read_per_join": "76"
            },
            "used_columns": [
              "product_id",
              "category_id",
              "position"
            ]
          }
        }
      ]
    }
  }
}