Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '69f2714f2e87dde4cbbaacc9726ac8b3e83629ea8fbdefaeb91d296c9a99c969' 
  AND token = 'uK+k5k3fpX/WSjnUgmI3P60Y6sf9/rDwCeOcHaWlVCI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00036

JSON explain

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