Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '5b5cf80b6bc65b28dd66e40a966b62907f087a6bf29d13c903cc9544c8bf408b' 
  AND token = 'WlubvE9uK9rDiRmH3AIXVX79mFrTaAxHg27Wm7QUrSE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

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