SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1324ba86cd9e54790b863cd3c59726ffdf7b975b8a66b4f033e2ff16fa5a4ac6' 
  AND token = 'fD2bYGwSokcg97/Fo2gPNqWic2oPhLrX/TEXxewm9ww=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00013

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