Smarter Regex Replace

Given the following string:

SELECT * FROM myTable WHERE Description LIKE 'some text'

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I am using a regular expression as follows:

[^[][*'][^]]

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This easily detects an asterisk or squote character that isn't enclosed in brackets. What I'd like to do is create a single regular expression that adds square brackets around a "naked" asterisk or squote character. I could do it with two discreet regex calls but I'm hoping there's a smarter way to build the regular expression such that if it finds any character in the middle part that it is automatically enclosed in square brackets.