Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'fa05c6054bab04b7e6d405ffebc83c362a5be69d7ce96f39e1fedd4a757b6bcb' 
  AND token = 'yyE3IJLjC6qflzaCnjelP2RfdL2xEhA/87ft/jcUaY0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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