Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c20ff727331ebb6dc79d0274db9d91d75c771cfe665a139da725ab1bc7f669e8' 
  AND token = 'sCt/4On2N5dmVpEkbUf8A43ofu4pW+n7tHG3HnSxoM4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00050

JSON explain

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