Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1add86e5c9761d110f364e159d54b11ce8eacb0cb04ee7890a8a50bed61ad3d0' 
  AND token = 'XcYLShAUcpMyMQdStnqewzJ7GE/xgnIWvZr6LiiM3PI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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