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 (
    82632, 83529, 87294, 87295, 85103, 86131, 
    86154, 86639, 86708, 85850, 85851, 
    85860, 85861, 85089, 85175, 85221, 
    85267, 85100, 83558, 83563, 85061, 
    85147, 85193, 85239, 87314, 87315, 
    87326, 87327, 87338, 87339, 87350, 
    87351, 89769, 85129, 86132, 86155, 
    86640, 86709, 86175, 86176, 86198, 
    86199, 85101, 85840, 85841, 87302, 
    87303, 85087, 85173, 85219, 85265, 
    86173, 86174, 86196, 86197, 82834, 
    82836, 82907, 82909, 82980, 82982, 
    83394, 83396, 83404, 83406, 85127, 
    86514, 86515, 86790, 86791, 85059, 
    85145, 85191, 85237, 82831, 82904, 
    82977, 83391, 83401, 89808, 89810, 
    89860, 89862, 89932, 89934, 91498, 
    91500, 86129, 86130, 86152, 86153, 
    85099, 85296, 85298, 85393, 85395
  )

Query time 0.00070

JSON explain

{
  "query_block": {
    "select_id": 1,
    "cost_info": {
      "query_cost": "1.80"
    },
    "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": "1.00",
            "eval_cost": "0.10",
            "prefix_cost": "1.45",
            "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 (82632,83529,87294,87295,85103,86131,86154,86639,86708,85850,85851,85860,85861,85089,85175,85221,85267,85100,83558,83563,85061,85147,85193,85239,87314,87315,87326,87327,87338,87339,87350,87351,89769,85129,86132,86155,86640,86709,86175,86176,86198,86199,85101,85840,85841,87302,87303,85087,85173,85219,85265,86173,86174,86196,86197,82834,82836,82907,82909,82980,82982,83394,83396,83404,83406,85127,86514,86515,86790,86791,85059,85145,85191,85237,82831,82904,82977,83391,83401,89808,89810,89860,89862,89932,89934,91498,91500,86129,86130,86152,86153,85099,85296,85298,85393,85395))",
          "cost_info": {
            "read_cost": "0.25",
            "eval_cost": "0.10",
            "prefix_cost": "1.80",
            "data_read_per_join": "16"
          },
          "used_columns": [
            "product_id",
            "parent_product_id",
            "group_id"
          ]
        }
      }
    ]
  }
}