SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1dca7985db6bc801671da83b67d2b2da6b7cc4c32a6d3d723b9298a53c192a96' 
  AND token = 'fyH+L83kA5p9CKw8r9hc8MHB8kUhYUsHnyRGZB5PvqM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00047

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