: The attacker adds a single quote to "break out" of the intended SQL command. The statement 4210=9078 is false . If the application is vulnerable, the database will return zero results or a different error than a standard "no results found" message.

The string you've provided, ' AND 4210=9078 AND 'lRLG'='lRLG , appears to be a attempt rather than a standard search query or a legitimate request for a product review. Analysis of the Query

What is SQL Injection? Tutorial & Examples | Web Security Academy