[BUG] pip.installed unable to locate matching distribution

Description
When I try to use the pip.installed state to install a pip package on a minion, the state fails with the error "No matching distribution found for ".

Setup

install_python-pip:
   pkg.latest:
     - name: python-pip

install_pip_MySQL-python:
  pip.installed:
    - name: MySQL-python

Steps to Reproduce the behavior
Running this state will result in the error:

 ID: install_pip_MySQL-python
    Function: pip.installed
        Name: MySQL-python
      Result: False
     Comment: Failed to install packages: MySQL-python. Error: Collecting MySQL-python   Retrying (Retry(total=4, connect=None, read=None, redirect=None, status=None)) after connection broken by 'NewConnectionError('<urllib3.connection.VerifiedHTTPSConnection object at 0x7f452aa49358>: Failed to establish a new connection: [Errno 101] Network is unreachable',)': /simple/mysql-python/
                Retrying (Retry(total=3, connect=None, read=None, redirect=None, status=None)) after connection broken by 'NewConnectionError('<urllib3.connection.VerifiedHTTPSConnection object at 0x7f452aa495c0>: Failed to establish a new connection: [Errno 101] Network is unreachable',)': /simple/mysql-python/
                Retrying (Retry(total=2, connect=None, read=None, redirect=None, status=None)) after connection broken by 'NewConnectionError('<urllib3.connection.VerifiedHTTPSConnection object at 0x7f452c2afc18>: Failed to establish a new connection: [Errno 101] Network is unreachable',)': /simple/mysql-python/
                Retrying (Retry(total=1, connect=None, read=None, redirect=None, status=None)) after connection broken by 'NewConnectionError('<urllib3.connection.VerifiedHTTPSConnection object at 0x7f452b3b3b70>: Failed to establish a new connection: [Errno 101] Network is unreachable',)': /simple/mysql-python/
                Retrying (Retry(total=0, connect=None, read=None, redirect=None, status=None)) after connection broken by 'NewConnectionError('<urllib3.connection.VerifiedHTTPSConnection object at 0x7f452b3b3908>: Failed to establish a new connection: [Errno 101] Network is unreachable',)': /simple/mysql-python/
                Could not find a version that satisfies the requirement MySQL-python (from versions: )
              No matching distribution found for MySQL-python
     Started: 10:37:30.022022
    Duration: 327149.561 ms
     Changes:

Similarly, if the pip.installed is changed to install the PyMySQL package, the same error (but with a different package name) will result.

Expected behavior
The MySQL-python pip package should install on the minion, or report that the package is already installed.

Versions Report

Additional context
While the state is applying, I can see on the minion that there is a process running:
/usr/bin/python3 -m pip install --disable-pip-version-check MySQL-python

If I run this command manually on the minion, it will run successfully, then if I run the state again from the master, it will correctly report that the package is installed.

Start at the pip.installed state entry point and reproduce the MySQL-python and PyMySQL cases from the issue. Compare the state invocation with the manually successful /usr/bin/python3 -m pip install --disable-pip-version-check MySQL-python command, including the reported network errors. Done means the state installs the package or correctly reports it as already installed.