SELECT 
  pfv.feature_id, 
  pfv.product_id, 
  pfv.variant_id, 
  gp.group_id 
FROM 
  cscart_product_features_values AS pfv 
  INNER JOIN cscart_product_variation_group_products AS gp ON pfv.product_id = gp.product_id 
  INNER JOIN cscart_product_variation_group_features AS gpf ON gpf.group_id = gp.group_id 
  AND gpf.feature_id = pfv.feature_id 
WHERE 
  pfv.lang_code = 'en' 
  AND gp.group_id IN (
    1096, 1142, 1162, 1105, 1151, 1170, 1064, 
    1110, 1132, 1153, 1138, 1154, 1166, 
    1183, 1117, 1134, 1171, 1185, 1125, 
    1128, 1169, 1087, 1147, 1075, 1113, 
    1124, 1145, 1080, 1141, 1143, 1116, 
    1094, 1167, 1118, 1058, 1063, 1051
  )

Query time 0.00406

JSON explain

{
  "query_block": {
    "select_id": 1,
    "cost_info": {
      "query_cost": "108.16"
    },
    "nested_loop": [
      {
        "table": {
          "table_name": "gp",
          "access_type": "range",
          "possible_keys": [
            "PRIMARY",
            "idx_group_id"
          ],
          "key": "idx_group_id",
          "used_key_parts": [
            "group_id"
          ],
          "key_length": "3",
          "rows_examined_per_scan": 86,
          "rows_produced_per_join": 86,
          "filtered": "100.00",
          "index_condition": "(`softwarepirmam_hewadelivard_cscart_4`.`gp`.`group_id` in (1096,1142,1162,1105,1151,1170,1064,1110,1132,1153,1138,1154,1166,1183,1117,1134,1171,1185,1125,1128,1169,1087,1147,1075,1113,1124,1145,1080,1141,1143,1116,1094,1167,1118,1058,1063,1051))",
          "cost_info": {
            "read_cost": "39.36",
            "eval_cost": "8.60",
            "prefix_cost": "47.96",
            "data_read_per_join": "1K"
          },
          "used_columns": [
            "product_id",
            "group_id"
          ]
        }
      },
      {
        "table": {
          "table_name": "gpf",
          "access_type": "ref",
          "possible_keys": [
            "PRIMARY",
            "idx_group_id"
          ],
          "key": "idx_group_id",
          "used_key_parts": [
            "group_id"
          ],
          "key_length": "3",
          "ref": [
            "softwarepirmam_hewadelivard_cscart_4.gp.group_id"
          ],
          "rows_examined_per_scan": 1,
          "rows_produced_per_join": 86,
          "filtered": "100.00",
          "cost_info": {
            "read_cost": "21.50",
            "eval_cost": "8.60",
            "prefix_cost": "78.06",
            "data_read_per_join": "8K"
          },
          "used_columns": [
            "feature_id",
            "group_id"
          ]
        }
      },
      {
        "table": {
          "table_name": "pfv",
          "access_type": "ref",
          "possible_keys": [
            "PRIMARY",
            "fl",
            "lang_code",
            "product_id",
            "fpl",
            "idx_product_feature_variant_id"
          ],
          "key": "fpl",
          "used_key_parts": [
            "feature_id",
            "product_id",
            "lang_code"
          ],
          "key_length": "12",
          "ref": [
            "softwarepirmam_hewadelivard_cscart_4.gpf.feature_id",
            "softwarepirmam_hewadelivard_cscart_4.gp.product_id",
            "const"
          ],
          "rows_examined_per_scan": 1,
          "rows_produced_per_join": 86,
          "filtered": "100.00",
          "cost_info": {
            "read_cost": "21.50",
            "eval_cost": "8.60",
            "prefix_cost": "108.16",
            "data_read_per_join": "66K"
          },
          "used_columns": [
            "feature_id",
            "product_id",
            "variant_id",
            "lang_code"
          ]
        }
      }
    ]
  }
}