Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '3bb07f15d2d6277e9a586bf272af5eae9c9ef5153968a3eeba309958de85234d' 
  AND token = 'zQgiJR3pKtzIS8hVY1EEZGyge/T8faKkVQ9rtHQUzt0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00043

JSON explain

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