Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd3e87b82ad5e2278cb9cef751eb7935092ba68c8b0453c42a50dcb664cc7255e' 
  AND token = 'fL+ybzPibcg0/XLwb3bkYVLUftXzzWwjNiRvMoV6D04=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00035

JSON explain

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