Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '606227ece49dd2b94aea6c3fb69ec16bf943432f1bdfe59396ac18729aa1cb70' 
  AND token = 'pYfd6eiC7cJ4zLSPhzAfLbndZCsnRxGkt70qNIbqCVQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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