Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'b5cb3f47281fe19a70f2c09d52c942680d8bb324ffd14f5d0f2ccd084c380a44' 
  AND token = 'Ueui8lLg/da+nhO7VfrseX/u5TLtJ02oo4k0h5Mxajo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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