Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'aaaf39e7c56afbaf26a2d850b4654837e396ca687287543a686c601fae214bc8' 
  AND token = 'JA4oFiOpUTrW6JSqyaAr+dPZt6lAgv9+WKn8sGVPfw8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

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