Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '24f1bdd3ea0fc9942096a43f93c5cf604b17028354407b0d81796f1a26089ab6' 
  AND token = '1MSjUkg/5VlRKXIm8qVm2JHr1GyErutdFGCd5RkFfeQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00053

JSON explain

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