Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '479bc0a6757e04d95ad3ad10f87f5ffae63f577e6d939c670694d918ab693593' 
  AND token = 'QUUi3Di/MrmDk6iGqQVQq8C8OO8ocvobMcMvr2KcgkA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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