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 (
    3354, 3834, 3308, 3306, 3841, 3212, 3226, 
    3350, 3218, 3392, 3301, 3751, 3828, 
    3520, 3529, 3809, 3518, 3918, 3215, 
    3213, 3597, 3752, 3552, 3836, 3232, 
    3589, 3556, 3845, 3822, 3370, 3843, 
    3840, 3882, 3377, 3373, 3593, 3551, 
    3831, 3519, 3919, 3356, 3404, 3366, 
    3222, 3522, 3401, 3358, 3537, 3291, 
    3225, 3844, 3876, 3559, 3917, 3528, 
    3819, 3922, 3534, 3531, 3812, 3372, 
    3374, 3309, 3590, 3351, 3532, 3546, 
    3827, 3548, 3521, 3355, 3398, 3357, 
    3369, 3807, 3525, 3408, 3746, 3393, 
    3744
  )

Query time 0.00113

JSON explain

{
  "query_block": {
    "select_id": 1,
    "cost_info": {
      "query_cost": "113.16"
    },
    "nested_loop": [
      {
        "table": {
          "table_name": "p",
          "access_type": "range",
          "possible_keys": [
            "PRIMARY",
            "idx_group_id"
          ],
          "key": "PRIMARY",
          "used_key_parts": [
            "product_id"
          ],
          "key_length": "3",
          "rows_examined_per_scan": 81,
          "rows_produced_per_join": 81,
          "filtered": "100.00",
          "index_condition": "(`softwarepirmam_hewadelivard_cscart_4`.`p`.`product_id` in (3354,3834,3308,3306,3841,3212,3226,3350,3218,3392,3301,3751,3828,3520,3529,3809,3518,3918,3215,3213,3597,3752,3552,3836,3232,3589,3556,3845,3822,3370,3843,3840,3882,3377,3373,3593,3551,3831,3519,3919,3356,3404,3366,3222,3522,3401,3358,3537,3291,3225,3844,3876,3559,3917,3528,3819,3922,3534,3531,3812,3372,3374,3309,3590,3351,3532,3546,3827,3548,3521,3355,3398,3357,3369,3807,3525,3408,3746,3393,3744))",
          "cost_info": {
            "read_cost": "48.36",
            "eval_cost": "8.10",
            "prefix_cost": "56.46",
            "data_read_per_join": "1K"
          },
          "used_columns": [
            "product_id",
            "parent_product_id",
            "group_id"
          ]
        }
      },
      {
        "table": {
          "table_name": "g",
          "access_type": "eq_ref",
          "possible_keys": [
            "PRIMARY"
          ],
          "key": "PRIMARY",
          "used_key_parts": [
            "id"
          ],
          "key_length": "3",
          "ref": [
            "softwarepirmam_hewadelivard_cscart_4.p.group_id"
          ],
          "rows_examined_per_scan": 1,
          "rows_produced_per_join": 81,
          "filtered": "100.00",
          "cost_info": {
            "read_cost": "20.25",
            "eval_cost": "8.10",
            "prefix_cost": "84.81",
            "data_read_per_join": "31K"
          },
          "used_columns": [
            "id",
            "code"
          ]
        }
      },
      {
        "table": {
          "table_name": "f",
          "access_type": "ref",
          "possible_keys": [
            "idx_group_id"
          ],
          "key": "idx_group_id",
          "used_key_parts": [
            "group_id"
          ],
          "key_length": "3",
          "ref": [
            "softwarepirmam_hewadelivard_cscart_4.p.group_id"
          ],
          "rows_examined_per_scan": 1,
          "rows_produced_per_join": 81,
          "filtered": "100.00",
          "cost_info": {
            "read_cost": "20.25",
            "eval_cost": "8.10",
            "prefix_cost": "113.16",
            "data_read_per_join": "8K"
          },
          "used_columns": [
            "feature_id",
            "purpose",
            "group_id"
          ]
        }
      }
    ]
  }
}