Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c6cb0f876c78ff66da326d5207f92b5c48ff70466ab800a4efd2f03c9f1daf23' 
  AND token = '2HTjxIX+/6L6z7IFYhARRUrvYO97VTt3m5b8XB49kNA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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