SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e4286c7a295dbaaf0204195979d0d803704f1151d3f9bc9c1aad1378b4800bd7' 
  AND token = '9xoaVtoeiu6X77oOazp9hGAJHndf5pmoJw+rhZaHNAU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00094

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