Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '79b59b59450c24096eb32a7b802d9e27aa5a55498de13b591e749cb5594095dc' 
  AND token = '/rDY6qLwH1zlZFfsDP/DnrwGUkuTf07yyIFXinHNwq0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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