Licensing expiration can apply to any licence, the set-up is very easy complete, and it’s been described at Create expiration for license product. A time range availability is set for an expiring licence, meaning after predefined end date the keys will go offline.
Once an order completed, the licensing details are saved as order itemmeta, to be used later by plugin classes or other 3rd parties. For an easy management the plugin include a dedicated metabox through which the expiration data ca be easy manageable. This is available through admin order interface, which is also described at Licence Keys Management – Admin Interface