Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '369fb4df4a20ed093a0f702ec9abf29b51de204e21c098f661f33a5c34983706' 
  AND token = 'mLb/pWih6da9beveI8gavXNwDMINQT8EOKS8HMf7loU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00037

JSON explain

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