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 (
    93326, 93327, 93328, 93329, 93330, 93331, 
    93332, 93333, 93334, 93335, 93336, 
    93337, 93896, 93897, 93898, 93899, 
    93900, 93901, 93902, 93903, 93904, 
    93905, 93906, 93907, 93908, 93909, 
    93910, 93911, 93912, 93913, 93914, 
    93915, 93916, 93917, 93918, 93919, 
    93920, 93921, 93922, 93923, 93924, 
    93925, 93926, 93927, 93928, 93929, 
    93930, 93931, 93932, 93933, 93934, 
    93935, 93936, 93937, 93938, 93939, 
    93940, 93941, 93942, 93943, 93944, 
    93945, 93946, 93947, 93948, 93949, 
    93950, 93951, 93952, 93953, 93954, 
    93955, 93956, 93957, 93958, 93959, 
    93960, 93961, 93962, 93963, 93964, 
    93965, 93966, 93967, 93968, 93969, 
    93970, 93971, 93972, 93973, 93974, 
    93975, 93976, 93977, 93978, 93979
  )

Query time 0.00071

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 (93326,93327,93328,93329,93330,93331,93332,93333,93334,93335,93336,93337,93896,93897,93898,93899,93900,93901,93902,93903,93904,93905,93906,93907,93908,93909,93910,93911,93912,93913,93914,93915,93916,93917,93918,93919,93920,93921,93922,93923,93924,93925,93926,93927,93928,93929,93930,93931,93932,93933,93934,93935,93936,93937,93938,93939,93940,93941,93942,93943,93944,93945,93946,93947,93948,93949,93950,93951,93952,93953,93954,93955,93956,93957,93958,93959,93960,93961,93962,93963,93964,93965,93966,93967,93968,93969,93970,93971,93972,93973,93974,93975,93976,93977,93978,93979))",
          "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"
          ]
        }
      }
    ]
  }
}