Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f8754dd4a2fa0a71938afdfc1c5c6132564db8134c28687316f94a6a937ad0f0' 
  AND token = 'tOv2vClrY0XMkcIPkb2Mwh7BuOn6pXGQ6FKiXq7t6VQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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