Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '20eb17535fae64686ef0964b8ddbf290fc397ed4974698fe2533cded24e360a3' 
  AND token = 'sCqMREfkhPRYJ1XrToEXgeDu7cFHyPrTWhDeDJ3YvpE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00058

JSON explain

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