Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9c06864c55a03dbfcd26f6af036cd398bb29f91cdc60745a384196c91c2da51f' 
  AND token = '4Crmbc/2OhiU6tTUjcdHxr2K6mpgIu8TIzdsv62FPxQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00035

JSON explain

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