SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0ad1b02a8275cb8c964d809e23f4352a731a5977314c7f96c8401ee696290dcd' 
  AND token = '5pixUqYMiIQKpReOeQkX/Rl3G7Q9Tnp3xPAEd1sUl8A=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00013

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