SELECT 
  f.feature_id, 
  f.purpose, 
  p.product_id, 
  p.parent_product_id, 
  g.id, 
  g.code 
FROM 
  cscart_product_variation_group_features AS f 
  INNER JOIN cscart_product_variation_groups AS g ON f.group_id = g.id 
  INNER JOIN cscart_product_variation_group_products AS p ON f.group_id = p.group_id 
WHERE 
  p.product_id IN (
    91550, 91619, 91788, 91789, 91790, 91791, 
    91792, 91793, 91794, 91795, 92501, 
    92502, 92503, 92504, 92505, 92506, 
    92507, 92192, 92193, 92194, 92195, 
    92196, 92204, 92205, 92206, 92207, 
    92208, 92209, 92442, 92443, 92448, 
    92147, 92148, 92149, 92349, 92350, 
    92351, 92352, 85580, 92151, 92152, 
    92153, 92353, 92354, 92355, 92356, 
    91893, 91894, 91895, 92337, 92338, 
    92339, 92340, 91839, 92450, 92451, 
    92452, 92453, 92454, 92455, 92456, 
    91838, 91837, 92500, 85039, 87370, 
    89609, 89610, 92198, 92199, 92200, 
    92201, 92202, 92444, 92445, 92446, 
    92447, 92146, 92203, 92449, 86857, 
    85037, 91870, 91869, 91871, 91872, 
    91873, 91874, 91875, 85038, 92458, 
    92459, 92460, 92461, 92462, 92463
  )

Query time 0.00063

JSON explain

{
  "query_block": {
    "select_id": 1,
    "cost_info": {
      "query_cost": "1.05"
    },
    "nested_loop": [
      {
        "table": {
          "table_name": "f",
          "access_type": "ALL",
          "possible_keys": [
            "idx_group_id"
          ],
          "rows_examined_per_scan": 1,
          "rows_produced_per_join": 1,
          "filtered": "100.00",
          "cost_info": {
            "read_cost": "0.25",
            "eval_cost": "0.10",
            "prefix_cost": "0.35",
            "data_read_per_join": "104"
          },
          "used_columns": [
            "feature_id",
            "purpose",
            "group_id"
          ]
        }
      },
      {
        "table": {
          "table_name": "g",
          "access_type": "eq_ref",
          "possible_keys": [
            "PRIMARY"
          ],
          "key": "PRIMARY",
          "used_key_parts": [
            "id"
          ],
          "key_length": "3",
          "ref": [
            "nuie_scalesta_net.f.group_id"
          ],
          "rows_examined_per_scan": 1,
          "rows_produced_per_join": 1,
          "filtered": "100.00",
          "cost_info": {
            "read_cost": "0.25",
            "eval_cost": "0.10",
            "prefix_cost": "0.70",
            "data_read_per_join": "400"
          },
          "used_columns": [
            "id",
            "code"
          ]
        }
      },
      {
        "table": {
          "table_name": "p",
          "access_type": "ref",
          "possible_keys": [
            "PRIMARY",
            "idx_group_id"
          ],
          "key": "idx_group_id",
          "used_key_parts": [
            "group_id"
          ],
          "key_length": "3",
          "ref": [
            "nuie_scalesta_net.f.group_id"
          ],
          "rows_examined_per_scan": 1,
          "rows_produced_per_join": 1,
          "filtered": "100.00",
          "index_condition": "(`nuie_scalesta_net`.`p`.`product_id` in (91550,91619,91788,91789,91790,91791,91792,91793,91794,91795,92501,92502,92503,92504,92505,92506,92507,92192,92193,92194,92195,92196,92204,92205,92206,92207,92208,92209,92442,92443,92448,92147,92148,92149,92349,92350,92351,92352,85580,92151,92152,92153,92353,92354,92355,92356,91893,91894,91895,92337,92338,92339,92340,91839,92450,92451,92452,92453,92454,92455,92456,91838,91837,92500,85039,87370,89609,89610,92198,92199,92200,92201,92202,92444,92445,92446,92447,92146,92203,92449,86857,85037,91870,91869,91871,91872,91873,91874,91875,85038,92458,92459,92460,92461,92462,92463))",
          "cost_info": {
            "read_cost": "0.25",
            "eval_cost": "0.10",
            "prefix_cost": "1.05",
            "data_read_per_join": "16"
          },
          "used_columns": [
            "product_id",
            "parent_product_id",
            "group_id"
          ]
        }
      }
    ]
  }
}