Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'dc21fe56ec93232faa1c070b119fd49bf8815bf8e0c949062a9bf56e62d01d82' 
  AND token = '1WxEiXBBdB3anFP23pIurQiH0s3iCXsx5TGgjG/gLgk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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