SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f010153f49007ec50ccc895e09f1f475452ea5b47b48aae2b199e8738437b483' 
  AND token = 'RkbriqBs9D8zgdUQM3FDA4oMo/y/XqGpWSGZ3B/OdTs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

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