Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '636d4823c85a8288795eae3edc6eb437c183dea525a943a44b052c053616c463' 
  AND token = 'fswCVz8cr4sC42Ht3sdlE6V9dnNqLkUIeUzTd+H5GO0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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