Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '597a1a68ae536a702862bb910b5f5031c469e0d157bfb75857c68aabafc91b98' 
  AND token = '9cOc8PxjMjpAiP//mLNiq2QaDJAmPK6sDFJR4pPVI6A=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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