Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'dc72412a08989aaec4e8ef48bad2ad3a3083f43625b1429f8ff180e7dfeee660' 
  AND token = 'TxjJzsiwBo1TPTuvPttXe9m5C6KYXTpxsMTJ3cjdabk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00039

JSON explain

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