SELECT 
  * 
From 
  cscart_sg_auction 
WHERE 
  1 
  AND product_id = 460948 
  AND status = 'A' 
  AND buy = 'no'

Query time 0.00021

JSON explain

{
  "query_block": {
    "select_id": 1,
    "cost": 0.0203088,
    "nested_loop": [
      {
        "table": {
          "table_name": "cscart_sg_auction",
          "access_type": "ALL",
          "loops": 1,
          "rows": 58,
          "cost": 0.0203088,
          "filtered": 100,
          "attached_condition": "cscart_sg_auction.product_id = 460948 and cscart_sg_auction.`status` = 'A' and cscart_sg_auction.buy = 'no'"
        }
      }
    ]
  }
}