Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '59de31ed6d693c99a809a59753f46ab603835bec13680c15e1f20614505e6554' 
  AND token = 'y6XaYlSiZMqCRZvdbrxHAN4ofiteY6AoDgQHJ4hnBSA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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