Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '957bf949177380590ac05687223ba2dab33aeeaf1961b728862e5be9fffb167c' 
  AND token = '4ibtS9X1Ox1eApqw6IeifhoFMnA0eDyTYGt/8c8dWnE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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