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 (
    460948, 190, 461277, 391037, 391032, 
    391031, 391030, 460955, 242, 243, 116541, 
    116547, 172, 168, 167, 169, 156, 175, 
    12702, 312043, 391029, 246, 312051, 
    461038, 173, 312048, 12712, 391035, 
    21914, 391033, 391036, 391034, 154, 
    161, 165, 166, 163, 155, 184, 183, 145, 
    12710, 12698, 157, 461039, 461275, 
    391040, 461037
  )

Query time 0.00038

JSON explain

{
  "query_block": {
    "select_id": 1,
    "cost": 0.03140489,
    "nested_loop": [
      {
        "table": {
          "table_name": "g",
          "access_type": "index",
          "possible_keys": ["PRIMARY"],
          "key": "idx_group_code",
          "key_length": "387",
          "used_key_parts": ["code"],
          "loops": 1,
          "rows": 2,
          "cost": 0.00693929,
          "filtered": 100,
          "using_index": true
        }
      },
      {
        "table": {
          "table_name": "f",
          "access_type": "ref",
          "possible_keys": ["idx_group_id"],
          "key": "idx_group_id",
          "key_length": "3",
          "used_key_parts": ["group_id"],
          "ref": ["u985510652_ecartify.g.id"],
          "loops": 2,
          "rows": 1,
          "cost": 0.00527872,
          "filtered": 100
        }
      },
      {
        "table": {
          "table_name": "p",
          "access_type": "ref",
          "possible_keys": ["PRIMARY", "idx_group_id"],
          "key": "idx_group_id",
          "key_length": "3",
          "used_key_parts": ["group_id"],
          "ref": ["u985510652_ecartify.g.id"],
          "loops": 2,
          "rows": 8,
          "cost": 0.01918688,
          "filtered": 100,
          "index_condition": "p.product_id in (460948,190,461277,391037,391032,391031,391030,460955,242,243,116541,116547,172,168,167,169,156,175,12702,312043,391029,246,312051,461038,173,312048,12712,391035,21914,391033,391036,391034,154,161,165,166,163,155,184,183,145,12710,12698,157,461039,461275,391040,461037)"
        }
      }
    ]
  }
}