The listing, YOOKA-LAYLEE AND THE IMPOSSIBLE LAIR - Steam Key has ended.
https://store.steampowered.com/app/846870/YookaLaylee_and_the_Impossible_Lair/
How to activate your steam key :
1- Launch the Steam client software and log into your Steam account.
2- Click the Games Menu.
3- Choose: Activate a Product on Steam...
4- Follow the onscreen instructions to complete the process.
No Refund due to the one-time use nature of this code.