Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'b1b9256277a70bd9ec15bb04f3cbdde663f296af452fc9d70c7813bb14854233' 
  AND token = 'sMlpVcbPaxCq8yxG2zQ+SDRK4nG0k5iIu0UcuJ7TkA8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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