Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ec862a6a423a6806e1a5392667f85abd229ce4558d558a3039e8db2b462e283a' 
  AND token = 'p6EH3U7+3hZrlHZyqtbbvI77D44AKcf/aWySSiNj3MY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}