If you are saying that you only have a choice of investing in your retirement or making payment on this debt, I'm not sure how you could really do either.
Let's look at the debt first. If you put $100 a month towards it, that is $1200. Considering that on 57000 the interest you are charged right now is over $4000 if doing nothing. You are not making a dent in the interest, let alone the principle.
Not investing in your retirement is not a great idea either. There will come a time when you will need that money at the end of your life when you aren't working. Compound interest works in your favour, especially if investing in anything that average 10% over the lifecycle of your retirement investment. $1200 a year is better than nothing though, if you were eliminating your debt. But you aren't.
Realistically, and depending on how the interest on your debt is calculated, you should be putting $350-$600 a month down on that debt to even get into the principle each year. And your 401k should be your first payment to yourself.
So my advice is you better get some more do-ray-me going by making more money and cutting expenses.