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 (
    91929, 91930, 91931, 91932, 91933, 91934, 
    91935, 89434, 89441, 82414, 86855, 
    89432, 89439, 82396, 86851, 86853, 
    84263, 84267, 82343, 84264, 89729, 
    89734, 86849, 89730, 91293, 82340, 
    82341, 82346, 86389, 86391, 89430, 
    89123, 89127, 89159, 89550, 83087, 
    89437, 91289, 89157, 89548, 90092, 
    90102, 90111, 82329, 86813, 86847, 
    89100, 83114, 83124, 83133, 90119, 
    83085, 89121, 89162, 89553, 89125, 
    89198, 86812, 89099, 82331, 86845, 
    91285, 83141, 91291, 90095, 90105, 
    90114, 91287, 84120, 83117, 83127, 
    83136, 90122, 89201, 91283, 83144, 
    84123, 91928, 90116, 89195, 84117, 
    83138, 90123, 92840, 92843, 94076, 
    94079, 94687, 94688, 94691, 94711, 
    94712, 94715, 96711, 96713, 96722
  )

Query time 0.00045

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 (91929,91930,91931,91932,91933,91934,91935,89434,89441,82414,86855,89432,89439,82396,86851,86853,84263,84267,82343,84264,89729,89734,86849,89730,91293,82340,82341,82346,86389,86391,89430,89123,89127,89159,89550,83087,89437,91289,89157,89548,90092,90102,90111,82329,86813,86847,89100,83114,83124,83133,90119,83085,89121,89162,89553,89125,89198,86812,89099,82331,86845,91285,83141,91291,90095,90105,90114,91287,84120,83117,83127,83136,90122,89201,91283,83144,84123,91928,90116,89195,84117,83138,90123,92840,92843,94076,94079,94687,94688,94691,94711,94712,94715,96711,96713,96722))",
          "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"
          ]
        }
      }
    ]
  }
}