Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f338ca5e2459f93302faaf5ae92e62d01b38811fb18d6146cb8c585e9bbb065f' 
  AND token = 'vk6JnK5ASma+XlhOg/OyKmroV/y1XnFHveF5rfqXWsE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00034

JSON explain

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