I'm not sure what is really meant by a game token here. If you mean something beyond the charisma/persuade modifier then 5e already has a bunch of those - bardic inspiration, Lucky feat, background traits, inspiration, various spells, etc.
Magic such as bardic inspiration is a feature of the campaign world. For me lucky is also a supernatural effect, similar to Spider-Man's intuition. Background traits are something I rarely cared about, although of course previous experience (including what I would call backstory) can affect target DC or grant advantage. Just like previous interactions with the NPC, the party's reputation and many other factors.
Inspiration is a metagame tool and something I have mixed feelings about. I accept inspiration as a fun game feature but I rarely use it. If someone plays a human (we've switched to 2024, they get inspiration after a long rest), I'll accept it as the blessings of the gods since human adventurers seem to be as common as hen's teeth in my games.
