SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9633582dd92660628dfe2b8c6bf790762fd526490e6297331253abbe46547c2e' 
  AND token = 'xEIglHjq3TR7n+1gxxm7oOmRTpzTCC+O/m7ed9uaJz8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

Explain
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE Impossible WHERE noticed after reading const tables