I'm sure if you PAGE size-select the libraries will be fine to sequence.
For next time I highly recommend that you use a gel-free library preparation kit. I work for Somagenics, and we just released our own small RNA library preparation kit that is gel-free and highly accurate (
https://somagenics.com/realseq-ac). But there are other companies that also have gel-free library preparation kits for small RNAs.