It doesn't sound like you were prosecuted and given that you probably don't have a record. I would call a records clerk in your area. You are able to get your own criminal record.
The amount of cocaine that it was is also important, I think. If it was a small amount you will probably get hasseled at customs, but it may not be that you aren't allowed at all. If it was a sizeable amount (i.e., an amount that may make it seem like you were trying to distribute the cocaine) you are probably ****ed.
Team Stand Alone #1