Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'b4233198ec408a9ac7501833bc752ccd4ffb04ec58a8125a94f866e15e71031f' 
  AND token = 'F3wEa4VTIjOaXwkvCqtZsReU8ya54NNC1yEbnJgZG0w=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00036

JSON explain

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