Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd2e4e740741f3f069e7aa1f14776dd1d6709d4dd2121b00c7b65bd3dd7182a62' 
  AND token = '4TFvmZ0GzuPknIhgZ88nhpJgyghod7QkKIqttBGe0cE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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