Sandbox

SELECT 
  1 
FROM 
  cscart_multi_declock_keys 
WHERE 
  key_id = '8689d433c33cefaf0e8f00b7c280a0f637a7c7b148590765e106e18e3ca05d40' 
  AND token = '+drW85eqsT2vmT4KgDqvJ0b1Hd0ktVi7KPyf0wltLvU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00037

JSON explain

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