Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'eba05bd3d0bd7d96633a690bf29b872f997306aa90cbfc15438510f87c8fe860' 
  AND token = 'tgnSUtURjVRi+PwOfUR7CJowe00I/OC25CCouavUH8g=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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