Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '005a90006d635e24aa3bea9101f8e7b5bbcb0447064e0c1f4e6597b9d6e86993' 
  AND token = 'Ys1UsPCucBOCrSkutCZcVzSHlyZAK3kXR82YdczS5HM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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