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 (
    91986, 91987, 91988, 91989, 91990, 91991, 
    91969, 91971, 91972, 91974, 91975, 
    86810, 82384, 82557, 82369, 82345, 
    82373, 82375, 91952, 82400, 82408, 
    82418, 89590, 89589, 86806, 82344, 
    82560, 82565, 82569, 82573, 82562, 
    82566, 82570, 91968, 82555, 82553, 
    82554, 86232, 86233, 82559, 82552, 
    82564, 82568, 82572, 91976, 91984, 
    86809, 82558, 82413, 86337, 86336, 
    92555, 92558, 92559, 92593, 92594, 
    92595, 92596, 94023, 94449, 94696, 
    94697, 94705, 94706, 94707, 94708, 
    96295, 96298, 96706, 96707, 96708, 
    96709, 96710, 96715, 96717, 96718, 
    96719, 96720, 96724, 96726, 96727, 
    96734, 96735, 96738, 96739, 96740, 
    96741, 96742, 96743, 96748, 96756, 
    96757, 96758, 96759, 96760, 96761
  )

Query time 0.00079

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 (91986,91987,91988,91989,91990,91991,91969,91971,91972,91974,91975,86810,82384,82557,82369,82345,82373,82375,91952,82400,82408,82418,89590,89589,86806,82344,82560,82565,82569,82573,82562,82566,82570,91968,82555,82553,82554,86232,86233,82559,82552,82564,82568,82572,91976,91984,86809,82558,82413,86337,86336,92555,92558,92559,92593,92594,92595,92596,94023,94449,94696,94697,94705,94706,94707,94708,96295,96298,96706,96707,96708,96709,96710,96715,96717,96718,96719,96720,96724,96726,96727,96734,96735,96738,96739,96740,96741,96742,96743,96748,96756,96757,96758,96759,96760,96761))",
          "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"
          ]
        }
      }
    ]
  }
}