This license is active for a very long time, because it will activate the software for more than 20 years. And apparently, the license key can also be used to Avast 4.8, Avast 5 and Avast 6.
KEY-Note: When I tested this key, Avast does not block these licenses. The Avast license key can be used on Avast free antivirus only and you can use the Avast free for non commercial uses only. Use the license as your own risk because there is no guarantee Avast would not block the license in the future.