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 = 7195 
WHERE 
  cscart_products_categories.product_id IN (
    95425, 95426, 95427, 95428, 95429, 95430, 
    95431, 95432, 95433, 95434, 95435, 
    95436, 95437, 95438, 95439, 95440, 
    95441, 95488, 95489, 95490, 95491, 
    95492, 95493, 95497, 95498, 95499, 
    95500, 95501, 95502, 95503, 95561, 
    95562, 95563, 95564, 95661, 95662, 
    95663, 95664, 95665, 95666, 95667, 
    95668, 95669, 95670, 95671, 95672, 
    95673, 95674, 95675, 95676, 95677, 
    95678, 95679, 95680, 95681, 95682, 
    95684, 95685, 95686, 95687, 95688, 
    95689, 95690, 95691, 95692, 95693, 
    95694, 95695, 95696, 95697, 95698, 
    95699, 95700, 95701, 95704, 95705, 
    95706, 95707, 95708, 95709, 95710, 
    95711, 95712, 95713, 95714, 95715, 
    95716, 95717, 95718, 95719, 95720, 
    95721, 95722, 95723, 95724, 95725
  ) 
GROUP BY 
  cscart_products_categories.product_id

Query time 0.01573

JSON explain

{
  "query_block": {
    "select_id": 1,
    "cost_info": {
      "query_cost": "95.70"
    },
    "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": 106,
            "rows_produced_per_join": 106,
            "filtered": "100.00",
            "using_index": true,
            "cost_info": {
              "read_cost": "10.90",
              "eval_cost": "10.60",
              "prefix_cost": "21.50",
              "data_read_per_join": "1K"
            },
            "used_columns": [
              "product_id",
              "category_id",
              "link_type"
            ],
            "attached_condition": "(`nuie_scalesta_net`.`cscart_products_categories`.`product_id` in (95425,95426,95427,95428,95429,95430,95431,95432,95433,95434,95435,95436,95437,95438,95439,95440,95441,95488,95489,95490,95491,95492,95493,95497,95498,95499,95500,95501,95502,95503,95561,95562,95563,95564,95661,95662,95663,95664,95665,95666,95667,95668,95669,95670,95671,95672,95673,95674,95675,95676,95677,95678,95679,95680,95681,95682,95684,95685,95686,95687,95688,95689,95690,95691,95692,95693,95694,95695,95696,95697,95698,95699,95700,95701,95704,95705,95706,95707,95708,95709,95710,95711,95712,95713,95714,95715,95716,95717,95718,95719,95720,95721,95722,95723,95724,95725))"
          }
        },
        {
          "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": 106,
            "filtered": "100.00",
            "cost_info": {
              "read_cost": "26.50",
              "eval_cost": "10.60",
              "prefix_cost": "58.60",
              "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": "26.50",
              "eval_cost": "0.53",
              "prefix_cost": "95.70",
              "data_read_per_join": "13K"
            },
            "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')))"
          }
        }
      ]
    }
  }
}