Like others have mentioned just pay it off immediately and it can actually positively impact your credit score because you've added additional lines of credit to your total amount.
Also, while it's well and good to be above 800 prime rates start at 750. So if you have the cash, aren't going to purchase anything stupid, and don't mind filling out paperwork it's literally a free $100.
As some anecdotal evidence - I refinanced my mortgage, my truck, and opened a new CC this yr and my score is still at a 750. If you really want your mind blown look up the guys who churn credit card points.