SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '30a845b713a1923913b3b383f3d4580b4ebd422b7bbbab0794e34f30196170d7' 
  AND token = 'GR/o8SZwXnBCocYkuK/idYeQRiFvTgQpzqPaLJ2vRTw=' 
  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"
    }
  }
}