Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '8032b667d20c0103c250aec29356a4b3dc36ed4b64ee88d50f5279914c67c74b' 
  AND token = 'J9p+xFRUFXsIm3WQ/cn1Qbx2FbY3lNDcOm0qG6OXxWM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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