Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd57bea8eb7b388c8598b2155f1d3ea70b4c830e10b41bf9c27755d36a8e57258' 
  AND token = 'AyUybU00+AL3MWHZk31JagEew4oB/PVN0MvRLckTT+4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00041

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}