Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'df6c9b4a29cd38477673323998566ce3f69af113877768e89d862194944d235f' 
  AND token = 'SsxgLXwWllhMufxlkNXgNNuJ6PawaXDeR5+L/znlLKg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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