Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd440ae69be5d5bf799e7521c664ab80e91e9c829dfc76c3e7c638a830806db7b' 
  AND token = 'DNgs8JQm57p9bVZfDP7izKLPEZNetjiHv4LEDeRxMzU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

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