Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2f6951ffde8c9c39753193c3b6c43dfef79fbaa3752887c95b91f1f20f7d618b' 
  AND token = 'AgmAfhZcKN1kSMMStTA4eTeiCb3R47nAytL6JCZU8yM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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