Sorting by shutter time

[Concorde-SST]

Hello,

I hope this question isn´t too obvious. Sometimes I accidentally
misfire a shot with a too slow shutter speed and the frame is
not in focus.

So I try to find all the photos in Lightroom with a shutter speed
slower than say, 1/60 second. The library of a recent shoot contains
13000 pics, so doing this by hand is a little tedious.

Does anyone know how I can approach this problem? I´ve thought
of writing an apple script but this I don´t master either.

Thanks for any help!!

Andreas.