Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '914a9009dd22b78e17cbfae1f273d132f412ee7a64ace6ab0999c8399c6e9e2f' 
  AND token = 'uZOHiZ/efpuzxAEdPu0nJm6h5wIYT8tezqsRLa6J1lo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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