Sandbox

SELECT 
  1 
FROM 
  cscart_june_setuplock_keys 
WHERE 
  key_id = '1774c42e9ba8ca3ed11588eb72be6a20de05ee9e4256736fd4653ac9429f20f1' 
  AND token = 'IznXOocOgrO7re/lMJxhrtq3cN2df9sXp/2iXQqWNs8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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