Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '5b4281ac9bb11bede26a0e186697d84548b8e1c598f85521582e97f725e22df6' 
  AND token = 'TxhZ4h/0HbGDu3HPbxhPpgKttW4aPoukIVQzPaNHTxc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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