If you pay it off with one payment only, chances are your creditor will not restart the clock and it will get off your credit report on the scheduled date.
There are two types of SOL, one is applied to debt collection and the other is meant for credit reporting. SOL for debt collection is the time frame after which the debt is declared to be uncollectible. It varies from state to state. It is counted from the date of last activity seen in your account.
The SOL for credit reporting agency aka seven year reporting time is same for all the states and it is counted from the date on which an item enters your credit file.