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 (
    87296, 87297, 85852, 85853, 85862, 85863, 
    91007, 91008, 91019, 91020, 91031, 
    91032, 91044, 91045, 85842, 85843, 
    91004, 91005, 91016, 91017, 91028, 
    91029, 91040, 91041, 91042, 90008, 
    90564, 90570, 90576, 84678, 87304, 
    87305, 87316, 87317, 87328, 87329, 
    87340, 87341, 89818, 89819, 89870, 
    89871, 89942, 89943, 91508, 91509, 
    83083, 83084, 83611, 83612, 90922, 
    90923, 91001, 91002, 87292, 87293, 
    89816, 89868, 89940, 91506, 85848, 
    85849, 85858, 85859, 83081, 83609, 
    90920, 90999, 89997, 90004, 86471, 
    86472, 86747, 86748, 85838, 85839, 
    90546, 89817, 89869, 89941, 91507, 
    83082, 83610, 90921, 91000, 86469, 
    86745, 84808, 84809, 84826, 84827, 
    84838, 84839, 91106, 91192, 91247
  )

Query time 0.00065

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 (87296,87297,85852,85853,85862,85863,91007,91008,91019,91020,91031,91032,91044,91045,85842,85843,91004,91005,91016,91017,91028,91029,91040,91041,91042,90008,90564,90570,90576,84678,87304,87305,87316,87317,87328,87329,87340,87341,89818,89819,89870,89871,89942,89943,91508,91509,83083,83084,83611,83612,90922,90923,91001,91002,87292,87293,89816,89868,89940,91506,85848,85849,85858,85859,83081,83609,90920,90999,89997,90004,86471,86472,86747,86748,85838,85839,90546,89817,89869,89941,91507,83082,83610,90921,91000,86469,86745,84808,84809,84826,84827,84838,84839,91106,91192,91247))",
          "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"
          ]
        }
      }
    ]
  }
}