In terms of word count, I'm sure the MIT License is one of the lowest. But if you're looking in terms of total legal overheard, you may want to consider that a

In terms of word count, I'm sure the MIT License is one of the lowest. But if you're looking in terms of total legal overheard, you may want to consider that a more modern license crafted by a legal team could possibly be better tuned for the laws than a license with a smaller word count. IANAL.