Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '4098e2a61a7e701d317d383bd6dfc97a956175fa1b4e8a8b359a482b6d4a7e65' 
  AND token = '3ku2w3hS0sZ8AkYPK7OPPv5qHSxypdZFD2JO/jLNFtA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00043

JSON explain

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