Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '457c62d198abb9d3a35ccd5340db8e0259c0dc1996a76634995f159d9481f4d5' 
  AND token = 'is3nDvzkudoGQ62vjmfjS/KVZ9/mhOdfIvI8N9M/5LI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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