Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '4f1fb487d2f59fb8e64610789005adf43cf69f9358f76a11961a8f6c4f217981' 
  AND token = 'NyoYr2HzCON7zoCrPPzrKfFolnHAaBdBDKFTq2OfgUA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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