Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e6c030189451f53fa42680ca6809325977144e5eb3b4a331f938bb7a5b8812d8' 
  AND token = '9wNlJFa30ifF8W7u0k1lpm0T78r4wdi8fdgLzTDhIpE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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