Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '8dce56871d5b94467d5c15b966c85519732e93227da057ce244d77d32d312b38' 
  AND token = '8nhujgWLraI+E8f3xK3y9r9chqig9321XASYuWj4yNw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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