Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9f66b0d36a147223d13b6dbc08b88385205b283c31b0ef7079e1f29acf3ca0c1' 
  AND token = 'i5tahYKJws/45PW3xDtDSOJl7WrzPA2djZ+Mk1yCIrw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}