SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '3ba0d404de688d715ec17551fb4b086a7707c8dfc7862ae9877e31ea263805f4' 
  AND token = '1qULA6H0Yn+4oamBUPiQUjkH0mSZGP8rLCwJpSvuAeQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

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