Force specific index disuse

Is there a way to force a specific index to be removed from
consideration in planning a single query?

Specifically, on a 60-million-row table I have an index that is a
candidate for removal. I have identified the sets of nightly queries
that use the index but before dropping it I would like to run EXPLAIN
and do timing tests on the queries to see the impact of not having that
index available and rewrite the query to efficiently use other indexes
if necessary.

Cheers,
Steve