Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '405c48fa5cf342ec088c692292db0faea5166b71980e7163f7788fa91c030f91' 
  AND token = 'bywlo8vIHNmShyolhp9jMIgWib6aIUDInnWSSvpDrTg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00016

JSON explain

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