Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'eeeddac4d993c0dc206ad5bd9143861865255afe5204c4467f92960006be41c0' 
  AND token = 'tWGb3Kra28roLmvkCn1qqURgr/6iN5J53sHkQORd9QI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}