Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '372e133e03ba365054cba9cb52e7ddcceb759ade06860721f7af0d1cba11d381' 
  AND token = 'Hw6zSvEgJPDfMkU4CDypXD60JfkhtPPCH5m4tJ8gdtI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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