Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '56a5b46e747fea296228fbbc7257241a7c3c228ce3f42941ac9bb6ab9313ebb5' 
  AND token = 'vTnBt16ElBPEcwT6EvzV0WxG/nSDnIz5JtnYNOgzOv4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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