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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '220afe93931f83fb619dc3de96da8a999a983151a40fe5173a001d0fa029f197' 
  AND token = '1rDgWF/Mzc0wMIPdU+nS0iRcHrPzZLAN1WYqTYi2Jjg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00048

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}