Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7548a83e63a3b509f63ada922ae5563fb9a1bbf6657de69a89cf611b32c5c38e' 
  AND token = 'ctA9VtRw5i6YksDS6VBctavFgfuwZ5GGwojpDq+tE+A=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00036

JSON explain

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