Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '77411b19a0b9d8d79c0a6b642eb9f51b3bb57a10d53903948bdb595eab290e16' 
  AND token = 'ClT68v52ecK0CSOKzQ6zHf+XgT7bLyC8xZD1vYOCy68=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00049

JSON explain

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