Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '340527d53a5e510274bafb0cb7fa8c0d08407c331ec9dc79ff3b7e66e219b5fa' 
  AND token = 'HPwNiBOAfCuIw4ljxwVk28OYLaESDMUIREdhv807YN8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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