Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'eb8a36ca5ce0ae393944633a9b9dca7df1a25fdfa0e87d882426b68f7b05d594' 
  AND token = 'o2lBtS0nvsURXJ7wCZqd2Ja1tHvmM8W3nPcCeXASrdo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00045

JSON explain

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