ASP.net Cache overuse?

Question

In a web project I perform a SELECT SQL query against an Indexed column of a table with 10-15 rows.

I want to ask you if it's good to cache this query in server memory as this SELECT against indexed tables is light and fast and its not complex at all. I cache to memory many things around (4GB) and I don't want to cache simple queries like this.

My question is what is the performance impact of this query if there is any against fetching cached data.