SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '6ad07e089f1929cc9f7fcf9736d7ea9e9fecf63f98ac62aea9b179156700251e' 
  AND token = 'TNn0OmcMWqPpZhMV8m49XT2keTfGHNnFFai6VASwoZo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00060

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