Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0c6096022b5bf1a5c1a8edb56f6854b4dbe5c021fc35ed6b736e6a87f0bc8764' 
  AND token = 'VAS+WaEy85qxGn9Hn8wtnppqYhl1o48SVe+JEWeiZug=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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