Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '985e8c03f4a47bc0a9abde57b07177a9b847b156f6e3f1f7b0b78e4e8fefec86' 
  AND token = 'itgUBj5HQ4Uje/TtfYOtrp2YL9V4xg9gTG1RXZiCSj4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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