If you have disc brakes you’ll do better than rim brakes as the wheel will tend to go out of true faster with uneven tension caused by one broken spoke.
If it’s a typical 32 spoke 3-cross wheel and you aren’t hammering it (kerb drops, big potholes etc) then it’s going to stay rideable quite a long time (probably) but you should certainly be planning spoke replacement soon. It’s a quick and easy job if you get a replacement of the right sort of length (LBS should be able to tell you what size you need if you show them the wheel). It’s probably going to take longer to remove the wheel and take the tyre off and refit it than it will take to refit a single spoke.
Plenty of reasonable guides online, all you need is a serviceable spoke wrench.