Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '4442571115d99128eea5a3192c79dd47b69233f2541bba3b16d9e6ce26143344' 
  AND token = 'Ssr1diZE9T0oXweVfCE/T9AskaDNXUDNR7djIclKELY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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