I don't think they'll care. I have a rec that will be a year and a half old by the time adcoms will get a look at it. I asked my prof right after I took a class with him, knowing full well that I was taking a year off after school. Sometimes it makes sense to get recs when people are guaranteed to remember you, so I'm sure more people than you think have "old recs"
I would, however, consider adding a third rec (or replacing one of your academic recs if you already have 3) with a rec from the job you took, so you have some feedback on what you've been doing the last year.