SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '94475dda0cb45edeb7411cf0f1c5a7a20ced3f857611fc59754aaa76b18ede22' 
  AND token = 'D1qyWVERqBJuIx0EvxCHDTRJXj3moqNnjt5CJp+VJsA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

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