Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2bb4fa05655a43eb1d81b804d06be611ea4a42c07f8b543feb4fad7056a030e1' 
  AND token = 'PRCDGkOM3DZBZ5Z4ttOWMTz6BbY+7pQWpIJJ725I/dw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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