Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7d634f65ed68d38dc011478db34bbd0ea78cb140e458ce36c49590f5a67b8003' 
  AND token = 'LFQHOq7MaXLqyTQvYzdEU2QszRf3QjNqCkXilyc9zNE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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