Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'd9ee1e7c9ee2d156ca1dcba6a971f9a486211769f575ab452b44e0be65bcf7f8' 
  AND token = '0JNvFoPbvlOAe+iqY28azFzQ8FVCjdTWNp9DRKWD7pU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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