Legal Question in Criminal Law in Texas

It is hard to answer this question without reviewing your record.

However, if all you did was pay a fine, this might be a class C misdemeanor which are only punishable by payment of a fine. But if this was a sale to a minor then it is less likely that the offense was a Class C misdemeanor. It is hard to tell since sales of different items to minors have different consequences.

Another possiblity is that in the plea bargain the charge you were arrested for was reduced.