Unless you have used it, it will still be active/usable. If you haven’t gifted any games away (either with their gift feature or by giving codes away), cross-reference with your Steam library to make sure. There’s also a script to show all the games you have unrevealed on HB: https://www.reddit.com/r/humblebundles/comments/inm60w/meta_how_to_easily_pull_a_list_of_all_your/