Can't pip install xlrd, connection times out

Question

When I try to install xlrd via

pip install xlrd

I get the error message that

Collecting xlrd
  Retrying (Retry(total=4, connect=None, read=None, redirect=None, status=None)) after connection broken by 'ConnectTimeoutError(<pip._vendor.urllib3.connection.VerifiedHTTPSConnection object at 0x03593510>, 'Connection to pypi.org timed out. (connect timeout=15)')': /simple/xlrd/

This error message repeats a few times and then I manually exit. How can I install xlrd?