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 (
    846, 832, 829, 828, 817, 816, 787, 819, 
    781, 760, 758, 752, 751, 750, 749, 747, 
    732, 731, 725, 724, 723, 717, 707, 673, 
    650, 647, 645, 644, 641, 639, 636, 624, 
    618, 616, 210, 197, 155, 51
  )

Query time 0.00092

JSON explain

{
  "query_block": {
    "select_id": 1,
    "cost_info": {
      "query_cost": "46.21"
    },
    "nested_loop": [
      {
        "table": {
          "table_name": "p",
          "access_type": "ALL",
          "possible_keys": [
            "PRIMARY",
            "idx_group_id"
          ],
          "rows_examined_per_scan": 190,
          "rows_produced_per_join": 38,
          "filtered": "20.00",
          "cost_info": {
            "read_cost": "15.82",
            "eval_cost": "3.80",
            "prefix_cost": "19.62",
            "data_read_per_join": "608"
          },
          "used_columns": [
            "product_id",
            "parent_product_id",
            "group_id"
          ],
          "attached_condition": "(`betaatif_store`.`p`.`product_id` in (846,832,829,828,817,816,787,819,781,760,758,752,751,750,749,747,732,731,725,724,723,717,707,673,650,647,645,644,641,639,636,624,618,616,210,197,155,51))"
        }
      },
      {
        "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": [
            "betaatif_store.p.group_id"
          ],
          "rows_examined_per_scan": 1,
          "rows_produced_per_join": 38,
          "filtered": "100.00",
          "cost_info": {
            "read_cost": "9.50",
            "eval_cost": "3.80",
            "prefix_cost": "32.92",
            "data_read_per_join": "3K"
          },
          "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": [
            "betaatif_store.p.group_id"
          ],
          "rows_examined_per_scan": 1,
          "rows_produced_per_join": 38,
          "filtered": "100.00",
          "cost_info": {
            "read_cost": "9.50",
            "eval_cost": "3.80",
            "prefix_cost": "46.22",
            "data_read_per_join": "14K"
          },
          "used_columns": [
            "id",
            "code"
          ]
        }
      }
    ]
  }
}