MODY is strongly genetic, and if neither of your parents has it, it is unlikely you have it, unless you have a spontaneous mutation. Which is not impossible.
On the other hand, you may just be extremely insulin-sensitive. It's a bell-shaped curve from those who are extremely sensitive on one end, and those who are very resistant on the other end. This has nothing to do with which type of diabetes you have -- it applies to everyone. Most people fall under the hump of the bell, but you may be one of the outliers.