Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e306cc02068b5b7c3c3d9f789e092b654310a246a8ced67c034db86d4fb62d32' 
  AND token = 'oMmf+GyAiRtt/ZuKnS9sA9Ax4GU+ihkuNQ4KybNCjTU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00036

JSON explain

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