Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'a1281c56545a56ec0ebe058684d1cc1efc9796de3e88c09127f9ead839fef384' 
  AND token = 'm/EylNO6RogOhs7V08fJGHnr9jJi5xXZDC9PAlAKQ0o=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

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