SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '5b94d42ab29dd85f854753a30ee0a2171d589c31baa90dddb15fa840ae0210ec' 
  AND token = '11X0osrh27GU6rbYRdotCv+Lo9hCXqVQziBpe+bCP/Q=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00014

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