SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '46e45d72155209cc577253372684b379b70e04a3f1b3b85b69317e33bcd38002' 
  AND token = '4yIvqyyYxoOhlytTwfT7NO+avRkqK5quOKU+fdkIcX0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00011

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