Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '4329e70ef7ddf1030c8f21ce8cafcaea7646f00c0029b289003211f6664e318d' 
  AND token = 'x2jUzukJtGTG5CfJilfUykYbXkTyJPzleLG7yBejamc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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