Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '489d9b5e090e801b7c87c49c47aa60182ea7414abad7fc9c280dc80b8b58ff42' 
  AND token = 'LKgVzTUn8skILjdQgtEfWXWySxFZXfh+AYRSuiJH0Kg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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