Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '25f39727f53b1055e01926b473b51cf6b7d3c6b2ee90799647f04c901d41ffca' 
  AND token = 'u5LY75UBQgXWryIc+4nPjwgYrx0XcBgmsOKqV2acXgE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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