Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1e25fd3bbcf0a57afbb05053c414c2cf0648edd2de9918ca411354ace7f90942' 
  AND token = '4UiWhyg2QbcfwZtHil6fnNbtDfcpq5qNQz6Y93rG+tQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00036

JSON explain

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