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, 3308, 3397, 3841, 3212, 3928, 3660, 
    3828, 3518, 3918, 3400, 3232, 3740, 
    3743, 3741, 3440, 3441, 10078, 3768, 
    3747, 3406, 3827, 3738, 3403, 3443, 
    3737, 3655, 3658, 3769, 3745, 3767, 
    3950, 3659, 3766, 3739, 3444, 3785, 
    3442, 3787, 3770, 3447, 3793, 3450, 
    3772, 3795, 3788, 3439, 3446, 3794, 
    3948, 3449, 3871, 3786, 3867, 3951, 
    3949, 3881, 11629, 8597, 8280, 8443, 
    8596, 11632, 8405, 8584, 8588, 8437, 
    8515, 8542, 10446, 10492, 11623, 11624, 
    11625, 11626, 11627, 11628, 11631
  )

Query time 0.00064

JSON explain

{
  "query_block": {
    "select_id": 1,
    "cost_info": {
      "query_cost": "109.21"
    },
    "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": 78,
          "rows_produced_per_join": 78,
          "filtered": "100.00",
          "index_condition": "(`softwarepirmam_hewadelivard_cscart_4`.`p`.`product_id` in (3354,3308,3397,3841,3212,3928,3660,3828,3518,3918,3400,3232,3740,3743,3741,3440,3441,10078,3768,3747,3406,3827,3738,3403,3443,3737,3655,3658,3769,3745,3767,3950,3659,3766,3739,3444,3785,3442,3787,3770,3447,3793,3450,3772,3795,3788,3439,3446,3794,3948,3449,3871,3786,3867,3951,3949,3881,11629,8597,8280,8443,8596,11632,8405,8584,8588,8437,8515,8542,10446,10492,11623,11624,11625,11626,11627,11628,11631))",
          "cost_info": {
            "read_cost": "46.81",
            "eval_cost": "7.80",
            "prefix_cost": "54.61",
            "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": 78,
          "filtered": "100.00",
          "cost_info": {
            "read_cost": "19.50",
            "eval_cost": "7.80",
            "prefix_cost": "81.91",
            "data_read_per_join": "30K"
          },
          "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": 78,
          "filtered": "100.00",
          "cost_info": {
            "read_cost": "19.50",
            "eval_cost": "7.80",
            "prefix_cost": "109.21",
            "data_read_per_join": "7K"
          },
          "used_columns": [
            "feature_id",
            "purpose",
            "group_id"
          ]
        }
      }
    ]
  }
}