Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '601d3bbc2dd7e921b7800bc301bde355de6264e0be9ece123cbbd9124374f888' 
  AND token = 'E8MhUaZKgPY9R3xBQSvc8o997Ke76jb6BSYvAvS+J74=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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