My suggestion is to either change the context you play games in, or pick games that are very cognitively different from what you normally do at work.
You can change your context with a new console, but I think it may be cheaper to do something like buying a controller and playing games while standing up, or on your couch/armchair, or playing games while sitting on a yoga ball. The point is to trick your brain, because it's associated sitting at a desk in front of a computer with boring tedium. Change the presentation and your subconscious will interpret it differently.
You can also achieve this by identifying the things that you have to do in your job that mirror videogame genres you enjoy and picking a game that shares few of those qualities.
I worked at the post office for years, doing mail processing, and my enjoyment of management and resource distribution style games went down sharply during that time because of the cognitive overlap- I played more roguelikes and RPGs as a consequence.
Yeah! Also, sometimes I use emulators that work well on phones to play older games, I had fun playing Final Fantasy Legends 2 with RetroArch.