SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9e630d8abd730326447a22f37e9e4f74b2a18608146074614bcc112280b203d1' 
  AND token = 'W8zskrftv8gWCHoKFPCN/vIuTUcKcfwdvLe0/9X8C48=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00045

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