Is there a potential performance improvement?
No. Bind variables are most useful when varying parameters are involved. Without them, the database would generate a new execution plan every time the query parameters changed (which is expensive). Bind variables encourage the database to cache and reuse a single execution plan, even when the parameters change. This saves the cost of compiling, boosting performance. There is really no benefit with constants. Since the value never changes, the database will always reuse the execution plan. So there is not much reason to use it on constants.
Is there potential to hurt performance?
I have a seen a few mentions of special cases where using bind variables on constants may actually degrade performance. But that is really on a case-by-case basis.