Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '66f282b486f7a6b51ce493211f246089b00653e5f0ae8620ebd8be7f7857f02f' 
  AND token = '8kQnDMJ7sc+u3z6RnkTkxdCoxcczSIMTOgOyGJCWevE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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