Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '5ec142867d36fcaf60272ee804c605309c76d8e1128bc12f26586e191d9eda96' 
  AND token = '9gHiBHq3oyccosqPqCsaqIe621AgZB4ofUMZDFhHcEc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00037

JSON explain

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