Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '12d765a9eb61ad819f6593ea32d679792f6b587ff18c0fdc85fc167265433697' 
  AND token = 'PNITTyUFj6dddGpNRf6iQTzJ8SQUuPJ9ee1OIy/LXkU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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