Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'aeb6531f608a0eb86ba149ba7dfa7cf87bb9c1f0bf1b58e222a5a5ddf30a527a' 
  AND token = 'DsdO+WdleA1mABNvaRVhMQaGfffmoVFrqtIL9t/aaDU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00184

JSON explain

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