Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '35fdaff0d04ea03db54f91f8adfe7ab9c39b44d2f3e3efce1bc71657f4bd9258' 
  AND token = 'EoTck6hskM5ixUN0G3wfLeKx2RnPR0qYjmUubV8M5VE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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