Hot socks would me one of few things in english. Really sexy socks, burning hot socks, socks that taste like hot sauce. But not socks that are making your feet warm.

Nope, nope, nope

teplý = 'warm' (or colloquial 'gay' (similar to German 'schwul')

horký = 'hot'

(pálivý = 'hot, spicy')

Many parts of clothing can be considered hot. But I don't think socks are among them.