False positive UndefinedName with typing.Literal

[Jasha10]

I am getting a false positive with typing.Literal:

# repro.py
import autoflake

code = """
from typing import Literal as L

var: L["* time"] = "* time"
"""

ret = autoflake.check(code)[0]
print("Got autoflake error:")
print(ret.message % ret.message_args)

$ python repro.py
Got autoflake error:
undefined name 'time'

$ autoflake --version
autoflake 1.4