SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'a96a8533856abdccae784f60edee0b76e483a90d90d7e59022a60dbfaaf3ad62' 
  AND token = 'MpdyYU/pXXpUYhLa3jxp8UMxQp5FxyASw891DSoZmwg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00014

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