SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1fcaba258d19fcd4e07e38f810c91ce97288cc1a56d965079dbd5b8d75e5f9e2' 
  AND token = '7mFgz8JBvaxtHsl1XBZnEN11gEvILV0YmzbvAJTPr/c=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

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