Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0667481f55f674d170b5bb753290acb9cc66cca08ddd5c604bfaaac3ae7d316c' 
  AND token = 'VHei/mD5mW9Q+mTyWdEq+Z/amiRtqgUhZv858CZObrM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00042

JSON explain

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